Human sexual activity
Human sexual activity, or human sexual practice or human sexual behavior, is the manner in which humans experience and express their sexuality. 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 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 and display behavior), and personal interactions between individuals, such as flirting and foreplay.
Human sexual activity has sociological, cognitive, emotional, behavioral and biological aspects; this includes personal bonding, shared emotions during sexual activity, and physiological processes such as the reproductive system, the sex drive and sexual intercourse and sexual behavior in all its forms.
In some cultures, sexual activity is considered acceptable only within marriage, although premarital and extramarital sex 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 assault, as well as sexual activity with a person below some locally determined age of consent, are criminal offenses in most jurisdictions.
- 1 Types
- 2 Stages of physiological arousal during sexual activity
- 3 Reasons for sexual activity
- 4 Frequency
- 5 Health and safety
- 6 Orientations and society
- 7 Other social aspects
- 8 Legal issues
- 9 See also
- 10 References
- 11 Further reading
Sexual activity can be classified in a number of ways. It can be divided into acts which involve one person, such as masturbation, or two or more people such as vaginal sex, anal sex, oral sex or mutual masturbation. If there are more than two participants in the sex act, it may be referred to as group sex. Autoerotic sexual activity can involve use of dildos, vibrators, anal beads, and other sex toys, though these devices can also be used with a partner. Sexual activity can be classified into the gender and sexual orientation of the participants, as well as by the relationship of the participants. For example, the relationships can be ones of marriage, intimate partners, casual sex partners or anonymous. Sexual activity can be regarded as conventional or as alternative, involving, for example, fetishism, urolagnia, and/or BDSM activities. Fetishism 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. Sexual activity can also be consensual or under force or duress, or lawful/illegal or otherwise contrary to social norms or generally accepted sexual morals. Some non-conventional autoerotic practices can be dangerous. These include erotic asphyxiation and self-bondage. The potential for injury or even death that exists while engaging in the partnered versions of these fetishes (choking and bondage, respectively) becomes drastically increased in the autoerotic case due to the isolation and lack of assistance in the event of a problem.
Stages of physiological arousal during sexual activity
- During the excitement phase, muscle tension and blood flow increase in and around the sexual organs, heart and respiration increase and blood pressure rises. Men and women experience a "sex flush" on the skin of the upper body and face. Typically, a woman's vagina becomes lubricated and her clitoris becomes swollen.
- During the plateau phase, heart rate and muscle tension increase further. A man's urinary bladder closes to prevent urine from mixing with semen. A woman's clitoris may withdraw slightly and there is more lubrication, outer swelling and muscles tighten and reduction of diameter.
- During the orgasm phase, breathing becomes extremely rapid and the pelvic muscles begin a series of rhythmic contractions. Both men and women experience quick cycles of muscle contraction of lower pelvic muscles and women often experience uterine and vaginal contractions; this experience can be described as intensely pleasurable, but roughly 15% of women never experience orgasm and half report having faked it. A large genetic component is associated with how often women experience orgasm.
- During the resolution phase, muscles relax, blood pressure drops, and the body returns to its resting state. Though generally reported that women do not experience a refractory period and thus can experience an additional orgasm, or multiple orgasms, soon after the first, some sources state that both men and women experience a refractory period because women may also experience a period after orgasm in which further sexual stimulation does not produce excitement. This period may last from minutes to days and is typically longer for men than women.
Sexual dysfunction is the inability to react emotionally or physically to sexual stimulation in a way projected of the average healthy person; it can affect different stages in the sexual response cycles, which are desire, excitement and orgasm. In the media, sexual dysfunction is often associated with men, but in actuality, it is more commonly observed in females (43 percent) than males (31 percent).
Reasons for sexual activity
People engage in sexual activity for any of a multitude of possible reasons. Although the primary evolutionary purpose of sexual activity is reproduction, research on college students suggested that people have sex for four general reasons: physical attraction, as a means to an end, to increase emotional connection, and to alleviate insecurity.
Most people engage in sexual activity because of pleasure they derive from sexual arousal, especially if they can achieve orgasm. Sexual arousal can also be experienced from foreplay and flirting, and from fetish or BDSM activities, or other erotic activities. Most commonly, people engage in sexual activity because of the sexual desire generated by a person to whom they feel sexual attraction; but they may engage in sexual activity for the physical satisfaction they achieve in the absence of attraction for another, as in the case of casual or social sex. At times, a person may engage in a sexual activity solely for the sexual pleasure of their partner, such as because of an obligation they may have to the partner or because of love, sympathy or pity 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. A man and woman may engage in sexual intercourse with the objective of conception. 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, attraction and interest.
It has been shown that sexual activity plays a large part in the interaction of social species. Joan Roughgarden, in her book 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.
The frequency of sexual activity might range from zero (sexual abstinence) to 15 or 20 times a week. In the United States, the average frequency of sexual intercourse for married couples is 2 to 3 times a week. It is generally recognized that postmenopausal women experience declines in frequency of sexual intercourse and that average frequency of intercourse declines with age. According to the Kinsey Institute, the average frequency of sexual intercourse in the US is 112 times per year (age 18–29), 86 times per year (age 30–39), and 69 times per year (age 40–49).
Health and safety
Sexual activity is a normal physiological function, but like other physical activity, it comes with risks. There are four main types of risks that may arise from sexual activity: unwanted pregnancy, contracting a sexually transmitted infection (STI/STD), physical injury, and psychological injury.
Any sexual activity that involves the introduction of semen into a woman's vagina, such as during sexual intercourse, or even contact of semen with her vulva, may result in an unintended pregnancy. To reduce the risk of pregnancy, some people who engage in penile-vaginal sex may use contraception, such as birth control pills, a condom, diaphragms, spermicides, hormonal contraception or sterilization. The effectiveness of the various contraceptive methods in avoiding pregnancy varies considerably.
Sexually transmitted infections
Sexual activity that involves contact with another person's bodily fluids carries the risk of contracting a sexually transmitted infection. Sexually transmitted infections are bacterial, viral or parasitic infections that are spread mainly by sexual activity, especially vaginal or anal intercourse or oral-genital contact. People may not be able to detect that their sexual partner has an STI because people are often asymptomatic (show no symptoms). The risk of STIs can be reduced by safe sex practices, such as using condoms. These precautions are often seen as less necessary for sex partners in committed relationships, if they are known to be free of STIs. Some people insist that a potential sex partner be tested for STIs before engaging in sex. There may also be an increased risk of contracting a STI when having sex with multiple partners.
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 or other drugs, or emotional states such as loneliness, depression or euphoria. Age and mental capacity of the participants can also affect the risks of sexual activity.
Typically, older men and women maintaining interest in sexual interest and activity could be therapeutic; it is a source of expressing their love and care for one another. Aging women with an intimate partner have been found to be in a better state of mental health compared to women lacking intimacy in their relationships. Factors such as biological and psychological factors, diseases, mental conditions, boredom with the relationship, and widowhood have been found to contribute with the common decrease in sexual interest and activity in old age. National sex surveys given in Finland in the 1990s revealed aging men, as a result a female widowhood, had a higher incidence of sexual intercourse compared to aging women and that women were more likely to report a lack of sexual desire compared to men. Regression analysis, factors considered important to female sexual activity included: sexual desire, valuing sexuality, and a healthy partner, while high sexual self-esteem, good health, and active sexual history were important to male sexual activity. Both aging genders agreed they needed good health, good sexual functioning, positive sexual self-esteem, and a sexually skilful partner to maintain sexual desire.
Orientations and society
Heterosexuality is the romantic or sexual attraction to the opposite sex. Heterosexual sexual practices are subject to laws in many places. In some countries, mostly those where religion has a strong influence on social policy, 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, committing sexual acts with anyone under an age of consent, performing sexual activities in public, and engaging in sexual activities for money (prostitution). 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, serially monogamous, or polyamorous, and, depending on the definition of sexual practice, abstinent or autoerotic (including masturbation). Additionally, 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 is the romantic or sexual attraction to the same sex. 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 men and lesbians 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 (hiding their sexuality in "the closet"). "Closet case" is a derogatory term used to refer to people who hide their sexuality. Making that orientation public can be called "coming out of the closet" in the case of voluntary disclosure or "outing" 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, as well as women who have sex with women, 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.
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. Despite stereotypes and common misconceptions, there are no forms of sexual acts exclusive to same-sex sexual behavior that cannot also be found in opposite-sex sexual behavior, except those involving the meeting of the genitalia between same-sex partners – tribadism (generally vulva-to-vulva rubbing, commonly known by its "scissoring" position) and frot (generally penis-to-penis rubbing).
Bisexuality and pansexuality
People who have a romantic or sexual attraction to both sexes 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.
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. Pansexuality is characterized by the potential for aesthetic attraction, romantic love, or sexual desire towards people without regard for their gender identity or biological sex. Some pansexuals suggest that they are gender-blind; 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, pansexuality "encompasses all kinds of sexuality; not limited or inhibited in sexual choice with regards to gender or practice".
Most people experiment with a range of sexual activities during their lives, although 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, sexual abstinence, asexuality). Some prefer monogamous relationships for sex, and others may prefer many different partners throughout their lives.
Alex Comfort 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 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).
A 1999 survey of students indicated that approximately 40% of ninth graders nationwide[clarification needed] report having sexual intercourse. This figure rises with each grade. Males are more sexually active than females at each of the grade levels surveyed. Sexual activity of young adolescents differs in ethnicity as well. A higher percent of African American and Hispanic adolescents are sexually active than White adolescents.
Religious and ethical
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, 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, behavior, speech etc.
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 (what can and can not be done by society's rules) and sexual norms (what is and is not expected).
Sexual ethics, morals, and norms relate to issues including deception/honesty, legality, fidelity and consent. Some activities, known as sex crimes in some locations, are illegal in some jurisdictions, including those conducted between (or among) consenting and competent adults (examples include sodomy law and adult-adult incest).
Some people who are in a relationship but want to hide polygamous activity (possibly of opposite sexual orientation) from their partner, may solicit consensual sexual activity with others through personal contacts, online chat rooms, or, advertising in select media.
Swinging, on the other hand, involves singles or partners in a committed relationship engaging in sexual activities with others as a recreational or social activity. The increasing popularity of swinging is regarded by some as arising from the upsurge in sexual activity during the sexual revolution of the 1960s. Swinging sexual activity can take place in a sex club, also known as a swinger club (not to be confused with a strip club).
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. Other aspects of the adult industry include phone sex operators, strip clubs, and pornography.
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, and if sexual penetration occurs it is called rape, 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) 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.
Sex outside of marriage
In the West, sex before marriage is not illegal. There are social taboos and many religions condemn pre-marital sex. In many Muslim countries, such as Saudi Arabia, Pakistan, Afghanistan, Iran, Kuwait, Maldives, Morocco, Oman, Mauritania, United Arab Emirates, Sudan, Yemen, any form of sexual activity outside marriage is illegal. Those found guilty, especially women, may be forced to wed the sexual partner, publicly beaten, or stoned to death. In many African and native tribes, sexual activity is not viewed as a privilege or right of a married couple, but rather as the unification of bodies and is thus not frowned upon.
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 seems to range from 16 to 18 years, but laws vary. 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.
Age of consent may vary by the type of sexual act, the sex of the actors, or other restrictions such as abuse of a position of trust. Some jurisdictions also make allowances for young people engaged in sexual acts with each other.
Most jurisdictions prohibit sexual activity between certain close relatives. These laws vary to some extent; such acts are called incestuous.
Non-consensual sexual activity or subjecting an unwilling person to witnessing a sexual activity are forms of sexual abuse, as well as (in many countries) certain non-consensual paraphilias such as frotteurism, telephone scatophilia (indecent phonecalls), and non-consensual exhibitionism and voyeurism (known as "indecent exposure" and "peeping tom" respectively).
Prostitution and survival sex
People sometimes exchange sex for money or access to other resources. This practice, called prostitution, takes place under many varied circumstances. 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 "john". Prostitution is one of the branches of the sex industry. The legal status of prostitution varies from country to country, from being a punishable crime to a regulated profession. Estimates place the annual revenue generated from the global prostitution industry to be over $100 billion. Prostitution is sometimes referred to as "the world's oldest profession". Prostitution may be a voluntary individual activity or facilitated or forced by pimps.
Survival sex is a form of prostitution engaged in by people in extreme need, usually when homeless or otherwise disadvantaged people trade sex for food, a place to sleep, or other basic needs, or for drugs. The term is used by sex trade and poverty researchers and aid workers.
- "Sex and Relationships". Channel 4. Retrieved 2013-06-30.
- "Improve your orgasm: you may have thought your sexual pleasure was the one thing that couldn't get any better. Think again – Sexual Fitness – physiology | Men's Fitness | Find Articles at BNET.com". Findarticles.com. Retrieved 2013-06-30.
- Daniel L. Schacter, Daniel T. Gilbert, Daniel M. Wegner (2010). Psychology. Macmillan. pp. 335–336. ISBN 1429237198. Retrieved November 10, 2012.
- Rosenthal, Martha (2012). Human Sexuality: From Cells to Society. Cengage Learning. pp. 134–135. ISBN 9780618755714. Retrieved September 17, 2012.
- "The Sexual Response Cycle". University of California, Santa Barbara. Archived from the original on 25 July 2011. Retrieved 6 August 2012.
- Irving B. Weiner, W. Edward Craighead (2010). The Corsini Encyclopedia of Psychology, Volume 2. John Wiley & Sons. p. 761. ISBN 0470170263. Retrieved November 10, 2012.
- Kontula, O & Mannila, E (2009). Sexual Activity and Sexual Desire. Routledge , 46(1). retrieved 20 August 2012, from here.
- Jha, S., & Thakar, R. (2010). Female sexual dysfunction. European Journal of Obstetrics & Gynecology and Reproductive Biology, 153(2), 117–123. retrieved 4 December 2012, from 
- Meston & Buss, 2007.
- "Improve your orgasm: you may have thought your sexual pleasure was the one thing that couldn't get any better. Think again — Sexual Fitness — physiology". Men's Fitness. 2002.
- Definition from Dictionary.com - Casual sex
- Holbrook, David (1972). The masks of hate: the problem of false solutions in the culture of an acquisitive society. Pergamon Press. p. 118. ISBN 978-0-08-015799-3.
- Institute, American Film (1997). The American Film Institute Catalog of Motion Pictures produced in the United States, Volume 1, Part 2 (reprint ed.). University of California Press. p. 369. ISBN 978-0-520-20970-1.
- Roughgarden, Joan (2004). Diversity, Gender, and Sexuality in Nature and People. University of California Press. ISBN 0-520-24073-1.
- Sexual health: An interview with a Mayo Clinic specialist[dead link]
- Varcarolis, E.M. (1990). Foundations of Psychiatric Mental Health Nursing. New York: W.B. Saunders Company. p. 787. ISBN 0-7216-1976-2.
- "ACOG 2003 Poster, Sociosexual Behavior in Healthy Women". Retrieved 2009-01-06.
- "Frequently asked questions to the Kinsey Institute for Research in Sex, Gender, and Reproduction Kinsey Institute". Retrieved 2009-01-06.
- Xiaojun Chen , Xuerui Tan, Qingying Zhang, " Cardiovascular effects of sexual activity", Medknow Publications, Dec. 2009
- Dawn Stacey: Contraception. About.com. Retrieved 11 October 2009.
- King, B. (2009). Human Sexuality Today (Sixth ed.). Upper Saddle River: Pearson Education, Inc.
- "An Overview of STIs". University of California Santa Barbara/soc.ucsb.edu. Retrieved October 1, 2013.
- Kontula, O., & Haavio-Mannila, E. The Impact of Aging on Human Sexual Activity and Sexual Desire. Journal of Sex Research, 46(10), 46-56.
- Sex Offenders and Sex Offenses: Overview. From FindLaw. Retrieved 13 October 2009.
- "Psychology Help Center". Apahelpcenter.org. Retrieved 2013-06-30.
- What is Nature[dead link]
- "Sexual Orientation, Homosexuality, and Bisexuality". APAHelpCenter.org. Retrieved 18 September 2012
- "GLAAD Media Reference Guide". Gay & Lesbian Alliance Against Defamation. Archived from the original on 1 January 2011. Retrieved 18 September 2012.
- Rosario, M., Schrimshaw, E., Hunter, J., & Braun, L. (February 2006). Sexual identity development among lesbian, gay, and bisexual youths: Consistency and change over time. Journal of Sex Research, 43(1), 46–58. Retrieved 4 April 2009.
- The American Heritage Dictionary of the English Language – Fourth Edition. Retrieved 9 February 2007, from Dictionary.com website
- "What is Bisexuality?". The Bisexual Index. Retrieved 14 March 2011.
- Soble, Alan (2006). "Bisexuality". Sex from Plato to Paglia: a philosophical encyclopedia 1. Greenwood Publishing Group. p. 115. ISBN 978-0-313-32686-8. Retrieved 28 February 2011.
- "Pansexuality". SexInfo Online. University of California, Santa Barbara.[dead link]
- Diamond, L., & Butterworth, M. (2008). Questioning gender and sexual identity: Dynamic links over time. Sex Roles. Published online 29 March 2008.
- "Definition of pansexual – Oxford Dictionaries (British & World English)". Oxford Dictionaries. 9 August 2012. Retrieved 2012-08-15.
- The Joy of Sex A Gourmet Guide to Lovemaking (1972) by Alex Comfort. See also ISBN 1-4000-4614-9.
- Meece, Judith L. Child and Adolescent Development for Educators. New York: McGraw Hill, 2008. Print.
- Hedonism, 2004-04-20 Stanford Encyclopedia of Philosophy
- Bergstrand, Curtis; Blevins Williams, Jennifer (10 October 2000). "Today's Alternative Marriage Styles: The Case of Swingers". Electronic Journal of Human Sexuality 3. Retrieved 2010-01-24.
- "Advice on Swingers' Clubs". Swinging Heaven. Retrieved 5 October 2012.
- "Human Rights Voices - Searching for Freedom, Chained by the Law". Eyeontheun.org. 2008-08-21. Retrieved 2013-06-30.
- Ernesto Londoño (9 September 2012). "Afghanistan sees rise in ‘dancing boys’ exploitation". The Washington Post (DEHRAZI, Afghanistan).
- "Home". AIDSPortal. Retrieved 2013-06-30.
- "Iran". Travel.state.gov. Retrieved 2013-06-30.
- "United Nations Human Rights Website - Treaty Bodies Database - Document - Summary Record - Kuwait". Unhchr.ch. Retrieved 2013-06-30.
- "Culture of Maldives - history, people, clothing, women, beliefs, food, customs, family, social". Everyculture.com. Retrieved 2013-06-30.
- Fakim, Nora (2012-08-09). "BBC News - Morocco: Should pre-marital sex be legal?". Bbc.co.uk. Retrieved 2013-06-30.
- "Interpol". Interpol". Retrieved 2013-06-30.
- "2010 Human Rights Report: Mauritania". State.gov. 2011-04-08. Retrieved 2013-06-30.
- Dubai FAQs. "Education in Dubai". Dubaifaqs.com. Retrieved 2013-06-30.
- Judd, Terri (2008-07-10). "Briton faces jail for sex on Dubai beach - Middle East - World". The Independent. Retrieved 2013-06-30.
- "Sudan must rewrite rape laws to protect victims". Reuters. 2007-06-28. Retrieved 2013-06-30.
- United Nations High Commissioner for Refugees. "Refworld | Women's Rights in the Middle East and North Africa - Yemen". Unhcr.org. Retrieved 2013-06-30.
- Machacek & Wilcox, "Sexuality and the World's Religions"
- "Girl faces lashing for pre-marital sex", Shanghai Daily, 2012
- Lee, "Exploring Sex Roles in African Studies", 1976
- Waites, Matthew (2005). The Age of Consent: Young People, Sexuality and Citizenship. Palgrave Macmillan. ISBN 1-4039-2173-3.
- "Kopple-Wolf.com". Kopple-Wolf.com. Retrieved 2013-06-30.
- "G.R. No. 126545". Lawphil.net. Retrieved 2013-06-30.
- [dead link]
- "G.R. No. 126921". Lawphil.net. Retrieved 2013-06-30.
- "Canada's age of consent raised by 2 years". CBC News. 1 May 2008. Retrieved 2009-03-22.
- Sex Offenses and Offenders. U.S. Department of Justice. Retrieved 14 October 2009.[dead link]
- "Prostitution Market Value". Retrieved 22 May 2010.
- The prostitution of women and girls – Page 5; Ronald B. Flowers – 1998
- Flowers, R. Barri (2010). Street kids: the lives of runaway and thrownaway teens. McFarland. pp. 110–112. ISBN 0-7864-4137-2.
- Hope Ditmore, Melissa (2010). Prostitution and Sex Work (Historical Guides to Controversial Issues in America). Greenwood. p. 4. ISBN 0-313-36289-0.
- Kelly, Sanja, Julia Breslin (2010). Women's Rights in the Middle East and North Africa: Progress Amid Resistance (Freedom in the World). Freedom House / Rowman & Littlefield Publishers. p. 556. ISBN 1-4422-0396-X.
|Wikimedia Commons has media related to Sex in humans.|
- Agmo Anders, Functional and dysfunctional sexual behavior. Elsevier 2007
- Durex Global Sex Survey 2005 at data360.org
- Ryan, Christopher & Jetha, Cacilda, (2010). Sex at Dawn: The Prehistoric Origins of Modern Sexuality. New York: Harper.
- Wunsch Serge PhD thesis about sexual behavior Paris, Sorbonne 2007