Human sexual behavior
Encyclopedia
Human sexual activities or human sexual practices or human sexual behavior refers to the manner in which humans experience and express their sexuality
Human sexuality
Human sexuality is the awareness of gender differences, and the capacity to have erotic experiences and responses. Human sexuality can also be described as the way someone is sexually attracted to another person whether it is to opposite sexes , to the same sex , to either sexes , or not being...

. People engage in a variety of sexual acts from time to time, and for a wide variety of reasons. Sexual activity normally results in sexual arousal
Sexual arousal
Sexual arousal, or sexual excitement, is the arousal of sexual desire, during or in anticipation of sexual activity. Things that precipitate human sexual arousal are called erotic stimuli, or colloquially known as turn-ons. There are many potential stimuli, both physical or mental, which can cause...

 and physiological changes in the aroused person, some of which are pronounced while others are more subtle. Sexual activity also includes conduct and activities which are intended to arouse the sexual interest of another, such as strategies to find or attract partners (mating
Courtship
Courtship is the period in a couple's relationship which precedes their engagement and marriage, or establishment of an agreed relationship of a more enduring kind. In courtship, a couple get to know each other and decide if there will be an engagement or other such agreement...

 and display
Display (zoology)
Display is a form of animal behaviour, linked to survival of the species in various ways. One example of display used by some species can be found in the form of courtship, with the male usually having a striking feature that is distinguished by colour, shape or size, used to attract a female...

 behavior), and personal interactions between individuals, such as flirting
Flirting
Flirting is a playful, romantic, or sexual overture by one person to another subtly indicating an interest in a deeper relationship with the other person, and can involve verbal communication as well as body language...

 and foreplay
Foreplay
In human sexual behavior, foreplay is a set of intimate psychological and physically intimate acts between two or more people meant to create desire for sexual activity and sexual arousal. Either or any of the sexual partners may initiate the foreplay, and they may not be the active partner during...

.

Human sexual activity has psychological, biological, physical
Physical intimacy
Physical intimacy is sensual proximity or touching. It can be enjoyed by itself or be an expression of feelings which people have for one another...

 and emotional aspects
Emotional intimacy
Emotional intimacy is an aspect of interpersonal relationships that varies in intensity from one relationship to another and varies from one time to another, much like physical intimacy. Affect, emotion and feeling may refer to different phenomena...

. Biologically
Biology
Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy. Biology is a vast subject containing many subdivisions, topics, and disciplines...

, it refers to the reproductive mechanism as well as the basic biological drive that exists in all species and can encompass sexual intercourse
Sexual intercourse
Sexual intercourse, also known as copulation or coitus, commonly refers to the act in which a male's penis enters a female's vagina for the purposes of sexual pleasure or reproduction. The entities may be of opposite sexes, or they may be hermaphroditic, as is the case with snails...

 and sexual contact in all its forms. Emotional aspects deal with the intense personal bonds
Human bonding
Human bonding is the process of development of a close, interpersonal relationship. It most commonly takes place between family members or friends, but can also develop among groups such as sporting teams and whenever people spend time together...

 and emotions generated between sexual partners by a sexual activity. Physical issues around sexuality range from purely medical
Medicine
Medicine is the science and art of healing. It encompasses a variety of health care practices evolved to maintain and restore health by the prevention and treatment of illness....

 considerations to concerns about the physiological
Physiology
Physiology is the science of the function of living systems. This includes how organisms, organ systems, organs, cells, and bio-molecules carry out the chemical or physical functions that exist in a living system. The highest honor awarded in physiology is the Nobel Prize in Physiology or...

 or even psychological
Psychology
Psychology is the study of the mind and behavior. Its immediate goal is to understand individuals and groups by both establishing general principles and researching specific cases. For many, the ultimate goal of psychology is to benefit society...

 and sociological
Sociology
Sociology is the study of society. It is a social science—a term with which it is sometimes synonymous—which uses various methods of empirical investigation and critical analysis to develop a body of knowledge about human social activity...

 aspects of sexual behaviour.

In some cultures sexual activity is considered acceptable only within marriage
Marriage
Marriage is a social union or legal contract between people that creates kinship. It is an institution in which interpersonal relationships, usually intimate and sexual, are acknowledged in a variety of ways, depending on the culture or subculture in which it is found...

, although premarital
Premarital sex
Premarital sex is sexual activity, including vaginal intercourse, oral sex, and anal sex, practiced by persons who are unmarried. Although it has always been practiced, in the West it has increased in prevalence since the mid-1950s...

 and extramarital sex
Extramarital sex
Extramarital sex occurs when a married person engages in sexual activity with someone other than his or her marriage partner.Where extramarital sexual relations breach a sexual norm it may also be referred to as adultery, fornication, philandery, or infidelity...

 are also common. Some sexual activities are illegal either universally or in some countries, and some are considered against the norms of a society. For example, sexual activity with a person below some age of consent
Age of consent
While the phrase age of consent typically does not appear in legal statutes, when used in relation to sexual activity, the age of consent is the minimum age at which a person is considered to be legally competent to consent to sexual acts. The European Union calls it the legal age for sexual...

 and sexual assault
Sexual assault
Sexual assault is an assault of a sexual nature on another person, or any sexual act committed without consent. Although sexual assaults most frequently are by a man on a woman, it may involve any combination of two or more men, women and children....

 in general are criminal offenses in many jurisdictions.

Types of sexual activity

Sexual activity can be classified in a number of ways. It can refer to acts which involve one person, such as masturbation
Masturbation
Masturbation refers to sexual stimulation of a person's own genitals, usually to the point of orgasm. The stimulation can be performed manually, by use of objects or tools, or by some combination of these methods. Masturbation is a common form of autoeroticism...

, or to two people, such as sexual intercourse
Sexual intercourse
Sexual intercourse, also known as copulation or coitus, commonly refers to the act in which a male's penis enters a female's vagina for the purposes of sexual pleasure or reproduction. The entities may be of opposite sexes, or they may be hermaphroditic, as is the case with snails...

, oral sex
Oral sex
Oral sex is sexual activity involving the stimulation of the genitalia of a sex partner by the use of the mouth, tongue, teeth or throat. Cunnilingus refers to oral sex performed on females while fellatio refer to oral sex performed on males. Anilingus refers to oral stimulation of a person's anus...

, or mutual masturbation. If there are more than two participants in the sex act, it may be referred to as group sex
Group sex
Group sex is sexual behavior involving more than two participants. Group sex can occur amongst people of all sexual orientations and genders...

. Autoerotic sexual activity can involve use of dildo
Dildo
A dildo is a sex toy, often explicitly phallic in appearance, intended for bodily penetration during masturbation or sex with partners.- Description and uses :...

s, vibrator
Vibrator (sex toy)
Vibrators are devices for the body and skin, to stimulate the nerves for a relaxing and pleasurable feeling. Some vibrators are designed to ergonomically stimulate erogenous zones for erotic stimulation.-History:...

s, anal beads
Anal beads
Anal beads are a sex toy consisting of multiple spheres or balls attached together in series which are continuously inserted through the anus into the rectum and then removed with varying speeds depending on the effect desired...

, and other sex toy
Sex toy
A sex toy is an object or device that is primarily used to facilitate human sexual pleasure. The most popular sex toys are designed to resemble human genitals and may be vibrating or non-vibrating...

s, though these devices can also be used with a partner.

Sexual activity can be classified into the gender
Gender
Gender is a range of characteristics used to distinguish between males and females, particularly in the cases of men and women and the masculine and feminine attributes assigned to them. Depending on the context, the discriminating characteristics vary from sex to social role to gender identity...

 and sexual orientation
Sexual orientation
Sexual orientation describes a pattern of emotional, romantic, or sexual attractions to the opposite sex, the same sex, both, or neither, and the genders that accompany them. By the convention of organized researchers, these attractions are subsumed under heterosexuality, homosexuality,...

 of the participants.

Sexual activity can also be classified according to the relationship of the participants. For example, the relationships can be ones of marriage
Marriage
Marriage is a social union or legal contract between people that creates kinship. It is an institution in which interpersonal relationships, usually intimate and sexual, are acknowledged in a variety of ways, depending on the culture or subculture in which it is found...

, intimate partners, casual sex partners or anonymous
Anonymous sex
Anonymous sex is a form of one-night stand or casual sex between people who have very little or no history with each other, often engaging in sexual activity on the same day of their meeting and usually never seeing each other again afterwards. The term "cruising for sex" is used to refer to...

. Sexual activity can be regarded as conventional or as alternative
Kink (sexual)
In human sexuality, kinkiness and kinky are terms used to refer to a playful usage of sexual concepts in an accentuated, and unambiguously expressive form....

, involving, for example, fetishism
Sexual fetishism
Sexual fetishism, or erotic fetishism, is the sexual arousal a person receives from a physical object, or from a specific situation. The object or situation of interest is called the fetish, the person a fetishist who has a fetish for that object/situation. Sexual fetishism may be regarded, e.g...

 and/or BDSM
BDSM
BDSM is an erotic preference and a form of sexual expression involving the consensual use of restraint, intense sensory stimulation, and fantasy power role-play. The compound acronym BDSM is derived from the terms bondage and discipline , dominance and submission , and sadism and masochism...

 activities.

Sexual activity can be consensual or under force or duress. It may be lawful or illegal or otherwise be contrary to social norms or generally accepted sexual morals.

Reasons for sexual activity

People engage in sexual activity for any of a multitude of possible reasons. Although the evolutionary purpose of sexual activity is reproduction, most people engage in sexual activity because of the sexual pleasure
Sexual arousal
Sexual arousal, or sexual excitement, is the arousal of sexual desire, during or in anticipation of sexual activity. Things that precipitate human sexual arousal are called erotic stimuli, or colloquially known as turn-ons. There are many potential stimuli, both physical or mental, which can cause...

 they derive from the activity, in which the most heightened pleasure is derived through orgasm
Orgasm
Orgasm is the peak of the plateau phase of the sexual response cycle, characterized by an intense sensation of pleasure...

. Erotic pleasure can also be experienced during foreplay
Foreplay
In human sexual behavior, foreplay is a set of intimate psychological and physically intimate acts between two or more people meant to create desire for sexual activity and sexual arousal. Either or any of the sexual partners may initiate the foreplay, and they may not be the active partner during...

 and from flirting
Flirting
Flirting is a playful, romantic, or sexual overture by one person to another subtly indicating an interest in a deeper relationship with the other person, and can involve verbal communication as well as body language...

, and from fetish
Sexual fetishism
Sexual fetishism, or erotic fetishism, is the sexual arousal a person receives from a physical object, or from a specific situation. The object or situation of interest is called the fetish, the person a fetishist who has a fetish for that object/situation. Sexual fetishism may be regarded, e.g...

 or BDSM
BDSM
BDSM is an erotic preference and a form of sexual expression involving the consensual use of restraint, intense sensory stimulation, and fantasy power role-play. The compound acronym BDSM is derived from the terms bondage and discipline , dominance and submission , and sadism and masochism...

 activities.

Most commonly, people engage in sexual activity with a person to whom they are sexually attracted
Sexual attraction
Sexual attractiveness or sex appeal refers to an individual's ability to attract the sexual or erotic interest of another person, and is a factor in sexual selection or mate choice. The attraction can be to the physical or other qualities or traits of a person, or to such qualities in the context...

; but at times, a person may engage in a sexual activity solely for the sexual pleasure of the partner, such as because of an obligation
Obligation
An obligation is a requirement to take some course of action, whether legal or moral. There are also obligations in other normative contexts, such as obligations of etiquette, social obligations, and possibly...

 they may have to the partner or because of sympathy
Sympathy
Sympathy is a social affinity in which one person stands with another person, closely understanding his or her feelings. Also known as empathic concern, it is the feeling of compassion or concern for another, the wish to see them better off or happier. Although empathy and sympathy are often used...

 or pity
Pity
Pity originally means feeling for others, particularly feelings of sadness or sorrow, and was once used in a comparable sense to the more modern words "sympathy" and "empathy"...

 they may feel for the partner.

Also, a person may engage in sexual activity for purely monetary considerations, or to obtain some advantage from either the partner or the activity. Furthermore, a man and woman may engage in sexual intercourse with the objective of conception
Conception
Conception, or a concept, is an abstract idea or a mental symbol.Conception may also refer to:* Conception, or fertilisation, the fusion of gametes to produce a new organism.* Conception , an album by Miles Davis...

. Some people engage in hate sex, which occurs between two people who strongly dislike or annoy each other. It is related to the idea that opposition between two people can heighten sexual tension
Sexual tension
Sexual tension is a social phenomenon that occurs when two people interact and one or both feel sexual desire, but the consummation is postponed or never happens....

, attraction and interest.

It has been shown that sexual activity plays a large part in the interaction of social species. Joan Roughgarden
Joan Roughgarden
Joan E. Roughgarden is an American evolutionary biologist.- Biography :...

, in her book "Evolutions Rainbow: Diversity, gender and sexuality in nature and people" postulates that this applies equally to humans as it does to other social species. She explores the purpose of sexual activity and demonstrates that there are many functions facilitated by such activity including pair bonding, group bonding, dispute resolution and reproduction.

Cultural aspects

As with other behaviors, human intelligence and social complexity have yielded the most complicated sexual behavior of any animal. Most people experiment with a range of sexual activities during their lives, though they tend to engage in only a few of these regularly. Some people enjoy many different sexual activities, while others avoid sexual activities altogether for religious or other reasons (see chastity
Chastity
Chastity refers to the sexual behavior of a man or woman acceptable to the moral standards and guidelines of a culture, civilization, or religion....

, sexual abstinence
Sexual abstinence
Sexual abstinence is the practice of refraining from some or all aspects of sexual activity for medical, psychological, legal, social, philosophical or religious reasons.Common reasons for practicing sexual abstinence include:*poor health - medical celibacy...

, asexuality
Asexuality
Asexuality , in its broadest sense, is the lack of sexual attraction and, in some cases, the lack of interest in sex. Sometimes, it is considered a lack of a sexual orientation...

). Some prefer monogamous relationships for sex, and others may prefer many different partners throughout their lives.

Social aspects

Alex Comfort
Alex Comfort
Alexander Comfort, MB BChir, PhD, DSc was a medical professional, gerontologist, anarchist, pacifist, conscientious objector and writer, best known for The Joy of Sex, which played a part in what is often called the sexual revolution...

 and others propose three potential social aspects of intercourse in humans, which are not mutually exclusive: reproductive, relational, and recreational. The development of the contraceptive pill and other highly effective forms of contraception
Contraception
Contraception is the prevention of the fusion of gametes during or after sexual activity. The term contraception is a contraction of contra, which means against, and the word conception, meaning fertilization...

 in the mid- and late 20th century has increased people's ability to segregate these three functions, which still overlap a great deal and in complex patterns. For example: A fertile couple may have intercourse while using contraception to experience sexual pleasure (recreational) and also as a means of emotional intimacy (relational), thus deepening their bonding, making their relationship more stable and more capable of sustaining children in the future (deferred reproductive). This same couple may emphasize different aspects of intercourse on different occasions, being playful during one episode of intercourse (recreational), experiencing deep emotional connection on another occasion (relational), and later, after discontinuing contraception, seeking to achieve pregnancy (reproductive, or more likely reproductive and relational).

Frequency of sexual activity

The frequency of sexual intercourse
Sexual intercourse
Sexual intercourse, also known as copulation or coitus, commonly refers to the act in which a male's penis enters a female's vagina for the purposes of sexual pleasure or reproduction. The entities may be of opposite sexes, or they may be hermaphroditic, as is the case with snails...

 might range from zero (sexual abstinence
Sexual abstinence
Sexual abstinence is the practice of refraining from some or all aspects of sexual activity for medical, psychological, legal, social, philosophical or religious reasons.Common reasons for practicing sexual abstinence include:*poor health - medical celibacy...

) to 15 or 20 times a week. In America, the average frequency of sexual intercourse for married couples is 2 to 3 times a week. It is generally recognized that postmenopausal
Menopause
Menopause is a term used to describe the permanent cessation of the primary functions of the human ovaries: the ripening and release of ova and the release of hormones that cause both the creation of the uterine lining and the subsequent shedding of the uterine lining...

 women experience declines in frequency of sexual intercourse and that average frequency of intercourse declines with age. According to the Kinsey Institute, average frequency of sexual intercourse in US is 112 times per year (age 18-29), 86 times per year (age 30-39), and 69 times per year (age 40-49).

Safety aspects

There are four main risks that arise from sexual activity. These are unwanted pregnancy
Pregnancy
Pregnancy refers to the fertilization and development of one or more offspring, known as a fetus or embryo, in a woman's uterus. In a pregnancy, there can be multiple gestations, as in the case of twins or triplets...

, contracting a sexually transmitted disease
Sexually transmitted disease
Sexually transmitted disease , also known as a sexually transmitted infection or venereal disease , is an illness that has a significant probability of transmission between humans by means of human sexual behavior, including vaginal intercourse, oral sex, and anal sex...

, physical injury, and psychological injuries.

Sexual activity that involves sexual intercourse
Sexual intercourse
Sexual intercourse, also known as copulation or coitus, commonly refers to the act in which a male's penis enters a female's vagina for the purposes of sexual pleasure or reproduction. The entities may be of opposite sexes, or they may be hermaphroditic, as is the case with snails...

 or even contact of semen with the vagina or vulva carries the chance of pregnancy. People who want to engage in such behaviors with a reduced chance of pregnancy employ any of a variety of available contraception
Contraception
Contraception is the prevention of the fusion of gametes during or after sexual activity. The term contraception is a contraction of contra, which means against, and the word conception, meaning fertilization...

 methods, such as birth control pills, the use of a condom
Condom
A condom is a barrier device most commonly used during sexual intercourse to reduce the probability of pregnancy and spreading sexually transmitted diseases . It is put on a man's erect penis and physically blocks ejaculated semen from entering the body of a sexual partner...

, diaphragm
Diaphragm (contraceptive)
The diaphragm is a cervical barrier type of birth control. It is a soft latex or silicone dome with a spring molded into the rim. The spring creates a seal against the walls of the vagina.-Use:...

s, spermicide
Spermicide
Spermicide is a contraceptive substance that eradicates sperm, inserted vaginally prior to intercourse to prevent pregnancy. As a contraceptive, spermicide may be used alone. However, the pregnancy rate experienced by couples using only spermicide is higher than that of couples using other methods...

s, hormonal contraception
Hormonal contraception
Hormonal contraception refers to birth control methods that act on the endocrine system. Almost all methods are composed of steroid hormones, although in India one selective estrogen receptor modulator is marketed as a contraceptive. The original hormonal method—the combined oral contraceptive...

, and sterilization.

Sexual activity that involves contact with another person's bodily fluids carries the risk of contracting a sexually transmitted disease
Sexually transmitted disease
Sexually transmitted disease , also known as a sexually transmitted infection or venereal disease , is an illness that has a significant probability of transmission between humans by means of human sexual behavior, including vaginal intercourse, oral sex, and anal sex...

 such as those arising from HIV
HIV
Human immunodeficiency virus is a lentivirus that causes acquired immunodeficiency syndrome , a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive...

/AIDS
AIDS
Acquired immune deficiency syndrome or acquired immunodeficiency syndrome is a disease of the human immune system caused by the human immunodeficiency virus...

, chlamydia, syphilis
Syphilis
Syphilis is a sexually transmitted infection caused by the spirochete bacterium Treponema pallidum subspecies pallidum. The primary route of transmission is through sexual contact; however, it may also be transmitted from mother to fetus during pregnancy or at birth, resulting in congenital syphilis...

, gonorrhea
Gonorrhea
Gonorrhea is a common sexually transmitted infection caused by the bacterium Neisseria gonorrhoeae. The usual symptoms in men are burning with urination and penile discharge. Women, on the other hand, are asymptomatic half the time or have vaginal discharge and pelvic pain...

, and HPV
Human papillomavirus
Human papillomavirus is a member of the papillomavirus family of viruses that is capable of infecting humans. Like all papillomaviruses, HPVs establish productive infections only in keratinocytes of the skin or mucous membranes...

. Safer sex practices try to reduce these risks. These precautions are often seen as less necessary for sex partners in committed relationships, if they are known to be free of disease. Some people require potential sex partners to be tested for sexually transmitted diseases before engaging in sex.

Physical risks vary with the type of sexual activity being engaged in. The medical condition and physical limitations of the participants must be kept in mind.

The risk factors are increased by a condition (temporary or permanent) which impairs a person's judgment, such as excess alcohol
Alcohol and sex
Alcohol consumption has a number of effects on sexual intercourse and sexual behavior. The effects of alcohol are a balance between its suppressive effects on sexual physiology, which will decrease sexual activity, and its suppression of psychological inhibitions, which will increase the desire for...

 or other drugs
DRUGS
Destroy Rebuild Until God Shows are an American post-hardcore band formed in 2010. They released their debut self-titled album on February 22, 2011.- Formation :...

, or emotional states such as loneliness
Loneliness
Loneliness is an unpleasant feeling in which a person feels a strong sense of emptiness and solitude resulting from inadequate levels of social relationships. However, it is a subjective experience...

, depression
Depression (mood)
Depression is a state of low mood and aversion to activity that can affect a person's thoughts, behaviour, feelings and physical well-being. Depressed people may feel sad, anxious, empty, hopeless, helpless, worthless, guilty, irritable, or restless...

 or euphoria
Euphoria (emotion)
Euphoria is medically recognized as a mental and emotional condition in which a person experiences intense feelings of well-being, elation, happiness, ecstasy, excitement and joy...

. Age and mental capacity of the participants can also affect the risks of sexual activity.

Sexual morality and social norms

Most world religions have sought to address the moral issues that arise from people's sexuality in society and in human interactions. Each major religion has developed moral codes covering issues of sexuality, morality, ethics etc. Though these moral codes do not address issues of sexuality directly, they seek to regulate the situations which can give rise to sexual interest and to influence people's sexual activities and practices. However, the impact of religious teaching has at times been limited. For example, though most religions disapprove of extramarital sexual relations
Extramarital sex
Extramarital sex occurs when a married person engages in sexual activity with someone other than his or her marriage partner.Where extramarital sexual relations breach a sexual norm it may also be referred to as adultery, fornication, philandery, or infidelity...

, it has always been widely practiced. Nevertheless, these religious codes have always had a strong influence on peoples' attitudes to issues of modesty in dress, behaviour, speech etc.

On the other hand, some people adopt the view that pleasure
Pleasure
Pleasure describes the broad class of mental states that humans and other animals experience as positive, enjoyable, or worth seeking. It includes more specific mental states such as happiness, entertainment, enjoyment, ecstasy, and euphoria...

 is its own justification for sexual activity. Hedonism
Hedonism
Hedonism is a school of thought which argues that pleasure is the only intrinsic good. In very simple terms, a hedonist strives to maximize net pleasure .-Etymology:The name derives from the Greek word for "delight" ....

 is a school of thought which argues that pleasure
Pleasure
Pleasure describes the broad class of mental states that humans and other animals experience as positive, enjoyable, or worth seeking. It includes more specific mental states such as happiness, entertainment, enjoyment, ecstasy, and euphoria...

 is the only intrinsic good
Intrinsic value (ethics)
Intrinsic value is an ethical and philosophic property. It is the ethical or philosophic value that an object has "in itself" or "for its own sake", as an intrinsic property...

.

Human sexual activity, like many other kinds of activity engaged in by humans, is generally influenced by social rules that are culturally specific and vary widely. These social rules are referred to as sexual morality
Sexual ethics
Sexual ethics refers to those aspects of ethics that deal with issues arising from all aspects of sexuality and human sexual behavior...

 (what can and can not be done by society's rules) and sexual norm
Sexual norm
A sexual norm can refer to a personal or a social norm. Most cultures have social norms regarding sexuality, and define normal sexuality to consist only of certain legal sex acts between individuals who meet specific criteria of age, consanguinity , race/ethnicity A sexual norm can refer to a...

s (what is and is not expected).

Sexual ethics, morals, and norms relate to issues including deception/honesty, legality, fidelity
Fidelity
"Fidelity" is the quality of being faithful or loyal. Its original meaning regarded duty to a lord or a king, in a broader sense than the related concept of fealty. Both derive from the Latin word fidēlis, meaning "faithful or loyal"....

 and consent. Some activities, known as sex crimes
Sex and the law
In general, laws proscribe acts which are considered either sexual abuse, or behavior that societies consider to be inappropriate and against the social norms. In addition, certain categories of activity may be considered crimes even if freely consented to...

 in some locations, are illegal in some jurisdictions, including those conducted between (or among) consenting and competent adults (examples include sodomy law
Sodomy law
A sodomy law is a law that defines certain sexual acts as crimes. The precise sexual acts meant by the term sodomy are rarely spelled out in the law, but are typically understood by courts to include any sexual act deemed unnatural. It also has a range of similar euphemisms...

 and adult-adult incest
Incest
Incest is sexual intercourse between close relatives that is usually illegal in the jurisdiction where it takes place and/or is conventionally considered a taboo. The term may apply to sexual activities between: individuals of close "blood relationship"; members of the same household; step...

).

Some people who are in a relationship but want to hide homosexual or heterosexual activity from their partner, may solicit consensual sexual activity with others through personal contacts, online chat rooms, or, advertising in select media.

Some people engage in various sexual activities as a business transaction. When this involves having sex with, or performing certain actual sexual acts for another person in exchange for money or something of value, it is called prostitution
Prostitution
Prostitution is the act or practice of providing sexual services to another person in return for payment. The person who receives payment for sexual services is called a prostitute and the person who receives such services is known by a multitude of terms, including a "john". Prostitution is one of...

. Other aspects of the adult industry
Sex industry
The sex industry consists of businesses which either directly or indirectly provide sex-related products and services or adult entertainment...

 include (for example) telephone sex
Phone sex
Phone sex is a type of virtual sex that refers to sexually explicit conversation between or other persons via telephone, especially when at least one of the participants masturbates or engages in sexual fantasy...

 operators, strip club
Strip club
A strip club is an adult entertainment venue in which striptease or other erotic or exotic dance is regularly performed. Strip clubs typically adopt a nightclub or bar style, but can also adopt a theatre or cabaret-style....

s, pornography
Pornography
Pornography or porn is the explicit portrayal of sexual subject matter for the purposes of sexual arousal and erotic satisfaction.Pornography may use any of a variety of media, ranging from books, magazines, postcards, photos, sculpture, drawing, painting, animation, sound recording, film, video,...

 and the like.

Legal issues

There are many laws and social customs which prohibit, or in some way have an impact on sexual activities. These laws and customs vary from country to country, and have varied over time. They cover, for example, a prohibition to non-consensual sex, to sex outside of marriage, to sexual activity in public, besides many others. Many of these restrictions are non-controversial, but some have been the subject of public debate.

Most societies consider it a serious crime to force someone to engage in sexual acts or to engage in sexual activity with someone who does not consent. This is called sexual assault
Sexual assault
Sexual assault is an assault of a sexual nature on another person, or any sexual act committed without consent. Although sexual assaults most frequently are by a man on a woman, it may involve any combination of two or more men, women and children....

, and if sexual penetration occurs it is called rape
Rape
Rape is a type of sexual assault usually involving sexual intercourse, which is initiated by one or more persons against another person without that person's consent. The act may be carried out by physical force, coercion, abuse of authority or with a person who is incapable of valid consent. The...

, the most serious kind of sexual assault. The details of this distinction may vary among different legal jurisdictions. Also, what constitutes effective consent in sexual matters varies from culture to culture and is frequently debated. Laws regulating the minimum age at which a person can consent to have sex (age of consent
Age of consent
While the phrase age of consent typically does not appear in legal statutes, when used in relation to sexual activity, the age of consent is the minimum age at which a person is considered to be legally competent to consent to sexual acts. The European Union calls it the legal age for sexual...

) are frequently the subject of debate, as is adolescent sexual behavior in general. Some societies have forced marriage, where consent may not be required.

Same sex laws

Many locales have laws that limit or prohibit same-sex sexual activity
Same-sex relationship
A same-sex relationship is a relationship between two persons of the same sex and can take many forms, from romantic and sexual, to non-romantic close relationships. The term is mainly associated with gay and lesbian people...

.

Minimum age of sexual activity (age of consent)

The laws of each jurisdiction set the minimum age at which a young person is allowed to engage in sexual activity. The median age of consent
Age of consent
While the phrase age of consent typically does not appear in legal statutes, when used in relation to sexual activity, the age of consent is the minimum age at which a person is considered to be legally competent to consent to sexual acts. The European Union calls it the legal age for sexual...

 seems to range from 16 to 18 years, but laws stating ages ranging from 9 to 21 do exist. In many jurisdictions, age of consent is a person's mental or functional age. As a result, victims can be of any chronological age if their mental age is below the age of consent. Many jurisdictions regard any sexual activity by an adult involving a child as child sexual abuse
Child sexual abuse
Child sexual abuse is a form of child abuse in which an adult or older adolescent uses a child for sexual stimulation. Forms of child sexual abuse include asking or pressuring a child to engage in sexual activities , indecent exposure with intent to gratify their own sexual desires or to...

.

Some jurisdictions forbid sexual activity outside of legal marriage completely. The relevant age may also vary by the type of sexual act, the sex of the actors, or other restrictions such as abuse of a position of trust
Position of trust
Position of trust is a legal term that is commonly used in the United Kingdom, the United States, and Canada. It refers to a position of authority over another person or within an organization, for example as a supervisor...

. Some jurisdictions may also make allowances for minors engaged in sexual acts with each other, rather than a hard and fast single age.

Incestuous relationships

Most jurisdictions prohibit sexual activity between certain close relatives. These laws vary to some extent, such acts are called incest
Incest
Incest is sexual intercourse between close relatives that is usually illegal in the jurisdiction where it takes place and/or is conventionally considered a taboo. The term may apply to sexual activities between: individuals of close "blood relationship"; members of the same household; step...

uous.

Sexual abuse

Non-consensual sexual activity or subjecting an unwilling person to witnessing a sexual activity are forms of sexual abuse
Sexual abuse
Sexual abuse, also referred to as molestation, is the forcing of undesired sexual behavior by one person upon another. When that force is immediate, of short duration, or infrequent, it is called sexual assault. The offender is referred to as a sexual abuser or molester...

, as well as (in many countries) certain non-consensual paraphilias such as frotteurism
Frotteurism
Frotteurism refers to a paraphilic interest in rubbing, usually one's pelvis or erect penis, against a non-consenting person for sexual gratification. It may involve touching any part of the body including the genital area. A person who practices frotteurism is known as a frotteur...

, telephone scatophilia (indecent phonecalls), and non-consensual exhibitionism
Exhibitionism
Exhibitionism refers to a desire or compulsion to expose parts of one's body – specifically the genitals or buttocks of a man or woman, or the breasts of a woman – in a public or semi-public circumstance, in crowds or groups of friends or acquaintances, or to strangers...

 and voyeurism
Voyeurism
In clinical psychology, voyeurism is the sexual interest in or practice of spying on people engaged in intimate behaviors, such as undressing, sexual activity, or other activity usually considered to be of a private nature....

 (known as "indecent exposure
Indecent exposure
Indecent exposure is the deliberate exposure in public or in view of the general public by a person of a portion or portions of his or her body, in circumstances where the exposure is contrary to local moral or other standards of appropriate behavior. Indecent exposure laws vary in different...

" and "peeping tom
Peeping Tom
Peeping Tom is a nickname commonly given to voyeurs, particularly males. It originated with the legend of Lady Godiva, when a man named Tom watched her during her nude ride and was struck blind or dead.It may also refer to:In music...

" respectively).

Heterosexuality

Heterosexual sexual practices are subject to laws in many places. In some countries, mostly those where religion has a strong influence on social policy
Social policy
Social policy primarily refers to guidelines, principles, legislation and activities that affect the living conditions conducive to human welfare. Thus, social policy is that part of public policy that has to do with social issues...

, marriage laws serve the purpose of encouraging people to have sex only within marriage. Sodomy laws were seen as discouraging same-sex sexual practices, but may affect opposite-sex sexual practices. Laws also ban adults from committing sexual abuse
Sexual abuse
Sexual abuse, also referred to as molestation, is the forcing of undesired sexual behavior by one person upon another. When that force is immediate, of short duration, or infrequent, it is called sexual assault. The offender is referred to as a sexual abuser or molester...

, committing sexual acts with anyone under an age of consent, performing sexual activities in public, and engaging in sexual activities for money (prostitution
Prostitution
Prostitution is the act or practice of providing sexual services to another person in return for payment. The person who receives payment for sexual services is called a prostitute and the person who receives such services is known by a multitude of terms, including a "john". Prostitution is one of...

). Though these laws cover both same-sex and opposite-sex sexual activities, they may differ in regard to punishment, and may be more frequently (or exclusively) enforced on those who engage in same-sex sexual activities.

Different-sex sexual practices may be monogamous
Monogamy
Monogamy /Gr. μονός+γάμος - one+marriage/ a form of marriage in which an individual has only one spouse at any one time. In current usage monogamy often refers to having one sexual partner irrespective of marriage or reproduction...

, serially monogamous, or polyamorous
Polyamory
Polyamory is the practice, desire, or acceptance of having more than one intimate relationship at a time with the knowledge and consent of everyone involved....

, and, depending on the definition of sexual practice, abstinent
Abstinence
Abstinence is a voluntary restraint from indulging in bodily activities that are widely experienced as giving pleasure. Most frequently, the term refers to sexual abstinence, or abstention from alcohol or food. The practice can arise from religious prohibitions or practical...

 or autoerotic (including masturbation
Masturbation
Masturbation refers to sexual stimulation of a person's own genitals, usually to the point of orgasm. The stimulation can be performed manually, by use of objects or tools, or by some combination of these methods. Masturbation is a common form of autoeroticism...

).

Different religious and political movements have tried to influence or control changes in sexual practices including courting and marriage, though in most countries changes occur at a slow rate.

Homosexuality

People with a homosexual orientation can express their sexuality in a variety of ways, and may or may not express it in their behaviors. Research indicates that many gay
Gay
Gay is a word that refers to a homosexual person, especially a homosexual male. For homosexual women the specific term is "lesbian"....

 men and lesbian
Lesbian
Lesbian is a term most widely used in the English language to describe sexual and romantic desire between females. The word may be used as a noun, to refer to women who identify themselves or who are characterized by others as having the primary attribute of female homosexuality, or as an...

s and gay men want, and succeed in having, committed and durable relationships. For example, survey data indicate that between 40% and 60% of gay men and between 45% and 80% of lesbians are currently involved in a romantic relationship.

It is possible for a person whose sexual identity is mainly heterosexual to engage in sexual acts with people of the same sex. For example, mutual masturbation in the context of what may be considered normal heterosexual teen development. Gay and lesbian people who pretend to be heterosexual are often referred to as being closeted
Closeted
Closeted and in the closet are metaphors used to describe lesbian, gay, bisexual, transgender, queer/questioning and intersex people who have not disclosed their sexual orientation or gender identity and aspects thereof, including sexual identity and sexual behavior.-Background:In late 20th...

 (hiding their sexuality in "the closet"). "Closet case" is a derogatory term used to refer to people who hide their sexuality. Making that orientation (semi-) public can be called "coming out of the closet" in the case of voluntary disclosure or "outing
Outing
Outing is the act of disclosing a gay, lesbian, bisexual or transgender person's true sexual orientation or gender identity without that person's consent. Outing gives rise to issues of privacy, choice, hypocrisy, and harm in addition to sparking debate on what constitutes common good in efforts...

" in the case of disclosure by others against the subject's wishes. Among some communities (called "men on the DL" or "down-low"), same-sex sexual behavior is sometimes viewed as solely for physical pleasure. Men who have sex with men
Men who have sex with men
Men who have sex with men are male persons who engage in sexual activity with members of the same sex, regardless of how they identify themselves; many men choose not to accept sexual identities of homosexual or bisexual...

, as well as women who have sex with women
Women who have sex with women
Women who have sex with women is a term used to identify women who engage in sexual activities with other women, whether or not they identify themselves as lesbian or bisexual...

, or men on the "down-low" may engage in sex acts with members of the same sex while continuing sexual and romantic relationships with the opposite sex.

The definition of homosexuality is an arousal or romantic attraction to members of one's own sex, though people who engage exclusively in same-sex sexual practices may not identify themselves as gay or lesbian. In sex-segregated environments, individuals may seek relationships with others of their own gender (known as situational homosexuality). In other cases, some people may experiment or explore their sexuality with same (and/or different) sex sexual activity before defining their sexual identity
Sexual identity
Sexual identity is a term that, like sex, has two distinctively different meanings. One describes an identity roughly based on sexual orientation, the other an identity based on sexual characteristics, which is not socially based but based on biology, a concept related to, but different from,...

. Despite stereotypes and common misconceptions, there are no forms of sexual activity exclusive to same-sex sexual behavior that can not also be found in opposite-sex sexual behavior, save those involving contact of the same sex genitalia such as tribadism
Tribadism
Tribadism or tribbing, commonly known by its scissoring position, is a form of non-penetrative sex in which a woman rubs her vulva against her partner's body for sexual stimulation. This may involve female-to-female genital contact or a female rubbing her vulva against her partner's thigh, stomach,...

 and frot
Frot
Frot is a slang term derived from frottage describing a form of non-penetrative male/male sex that usually but not always involves direct penis-to-penis contact....

.

Bisexuality and pansexuality

People who are physically and/or romantically attracted to both men and women are referred to as bisexual. People who have a distinct but not exclusive preference for one sex/gender over the other may also identify themselves as bisexual. Like gay and lesbian individuals, bisexual people who pretend to be heterosexual are often referred to as being closeted
Closeted
Closeted and in the closet are metaphors used to describe lesbian, gay, bisexual, transgender, queer/questioning and intersex people who have not disclosed their sexual orientation or gender identity and aspects thereof, including sexual identity and sexual behavior.-Background:In late 20th...

.

Pansexuality (also referred to as omnisexuality) may or may not be subsumed under bisexuality, with some sources stating that bisexuality encompasses sexual or romantic attraction to all gender identities
Gender identity
A gender identity is the way in which an individual self-identifies with a gender category, for example, as being either a man or a woman, or in some cases being neither, which can be distinct from biological sex. Basic gender identity is usually formed by age three and is extremely difficult to...

. Pansexality is characterized by the potential for aesthetic attraction, romantic love
Romantic love
Romance is the pleasurable feeling of excitement and mystery associated with love.In the context of romantic love relationships, romance usually implies an expression of one's love, or one's deep emotional desires to connect with another person....

, or sexual desire towards people without regard for their gender identity or biological sex
Sex
In biology, sex is a process of combining and mixing genetic traits, often resulting in the specialization of organisms into a male or female variety . Sexual reproduction involves combining specialized cells to form offspring that inherit traits from both parents...

. Some pansexuals suggest that they are gender-blind
Gender-blind
Gender-blind is a term describing activities undertaken and services provided without regard to the gender of those who participate.- Choice of words :Unisex is an older term, and a misnomer meaning "one sex"....

; that gender and sex are insignificant or irrelevant in determining whether they will be sexually attracted to others. As defined in the Oxford English Dictionary
Oxford English Dictionary
The Oxford English Dictionary , published by the Oxford University Press, is the self-styled premier dictionary of the English language. Two fully bound print editions of the OED have been published under its current name, in 1928 and 1989. The first edition was published in twelve volumes , and...

,
pansexuality "encompasses all kinds of sexuality; not limited or inhibited in sexual choice with regards to gender or practice".

Alternative practices

Some people derive sexual pleasure from engaging in variety of alternative sexual practices
Kink (sexual)
In human sexuality, kinkiness and kinky are terms used to refer to a playful usage of sexual concepts in an accentuated, and unambiguously expressive form....

, such as fetishism
Sexual fetishism
Sexual fetishism, or erotic fetishism, is the sexual arousal a person receives from a physical object, or from a specific situation. The object or situation of interest is called the fetish, the person a fetishist who has a fetish for that object/situation. Sexual fetishism may be regarded, e.g...

 and/or BDSM
BDSM
BDSM is an erotic preference and a form of sexual expression involving the consensual use of restraint, intense sensory stimulation, and fantasy power role-play. The compound acronym BDSM is derived from the terms bondage and discipline , dominance and submission , and sadism and masochism...

 activities.

BDSM
BDSM
BDSM is an erotic preference and a form of sexual expression involving the consensual use of restraint, intense sensory stimulation, and fantasy power role-play. The compound acronym BDSM is derived from the terms bondage and discipline , dominance and submission , and sadism and masochism...

 often involves a consensual power exchange, whereby one person submits
Submission
Submission is the acknowledgement of the legitimacy of the power of one's superior or superiors.Submission may also refer to:* Submission/Submitter , an Islamic organisation...

 to the control of a dominating partner. These practices can include spanking
Erotic spanking
Erotic spanking is the act of spanking another person for the sexual arousal or gratification of either or both parties...

, bondage, role playing, role reversals, and raising endorphins through the use of whips, floggers and other implements.

Fetishism
Sexual fetishism
Sexual fetishism, or erotic fetishism, is the sexual arousal a person receives from a physical object, or from a specific situation. The object or situation of interest is called the fetish, the person a fetishist who has a fetish for that object/situation. Sexual fetishism may be regarded, e.g...

 can take many forms ranging from the desire for certain body parts, for example large breasts, armpits or foot worship. The object of desire can often be shoes, boots, lingerie, clothing, leather or rubber items.

Some non-conventional autoerotic practices can be dangerous. These include erotic asphyxiation
Erotic asphyxiation
Erotic asphyxiation or breath control play is the intentional restriction of oxygen to the brain for sexual arousal. The sexual preference for that behavior is variously called asphyxiophilia, autoerotic asphyxia, hypoxyphilia. Colloquially, a person engaging in the activity is sometimes called a...

 and self-bondage
Self-bondage
Self-bondage refers to the use of restraints on oneself for sexual pleasure. It is a form of sexual bondage which can be practiced alone.Self-bondage is characterized by experimentation and ingenuity, and can be riskier than conventional bondage...

. The potential for injury or even death that exists while engaging in the partnered versions of these fetishes
Fetishism
A fetish is an object believed to have supernatural powers, or in particular, a man-made object that has power over others...

 (choking and bondage
Bondage (sexual)
Bondage is the use of restraints for the sexual pleasure of the parties involved. It may be used in its own right, as in the case of rope bondage and breast bondage, or as part of sexual activity or BDSM activity.- Private bondage :...

, respectively) becomes drastically increased in the autoerotic case due to the isolation and lack of assistance in the event of a problem.

See also

  • Child sexuality
    Child sexuality
    Child sexuality is the sexual feelings, behaviors, and development of children.-Freud:Until Sigmund Freud published his Three Essays on the Theory of Sexuality in 1905, children were often regarded as asexual, having no sexuality until later development. Freud was one of the first researchers to...

  • History of human sexuality
    History of human sexuality
    The social construction of sexual behavior—its taboos, regulation and social and political impact—has had a profound effect on the various cultures of the world since prehistoric times.- Sources :...

  • Human female sexuality
    Human female sexuality
    Human female sexuality encompasses a broad range of behaviors and processes, including female sexual identity and sexual behavior, the physiological, psychological, social, cultural, political, and spiritual or religious aspects of sex...

  • Human male sexuality
    Human male sexuality
    Human male sexuality covers physiological, psychological, social, cultural, and political aspects of the human male sexual response and related phenomenon...

  • Lesbian sexual practices
    Lesbian sexual practices
    Lesbian sexual practices are sexual activities where the participants are only women. The participants can be lesbian or bisexual women, though some prefer to refer to themselves as women who have sex with women and dispense with sexual identification...

  • Mechanics of sex
  • Orgasm control
    Orgasm control
    Orgasm control, also known as "edging", "peaking", "surfing", and by other terms, is a sexual technique which involves the maintenance of a high level of sexual arousal for an extended period of time without reaching orgasm, although orgasm can be reached eventually. If orgasm is not reached after...


Further reading

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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