Human sexuality

Human sexuality is how people experience the erotic and express themselves as sexual beings; the awareness of themselves as males or females; the capacity they have for erotic experiences and responses. Human sexuality can be described as the way someone is sexually attracted to another person of the opposite sex (heterosexuality), to the same sex (homosexuality), to both sexes (bisexuality), or attracted to no sexes in a sexual way (asexuality).

It used to be believed that human sexual behavior was different from the sexual behavior of most other animals, in that it was practiced for reasons besides copulation. Current understanding is that many species that were formerly believed monogamous have now been proven to be promiscuous or opportunistic in nature; a wide range of species appear both to masturbate and to use objects as tools to help them do so, where procreation is not the aim. See animal sexual behaviour.

The term human sexuality can also cover cultural, political, legal and philosophical aspects. It may also refer to issues of morality, ethics, theology, spirituality or religion and how they relate to all things sexual.

Nature versus nurture debate
Like all things in biology, there is no simple answer.

Sexual drives among heterosexuals, homosexuals, bisexuals, and others are all driven partially by their genetics and also by superior mental activity and by social, cultural, educational, and normative characteristics of those places where the subjects grow up and their personality develops.

Each of these sexual lifestyles will then drive personal identity and in the social evolution of individuals. And will be a powerful force that affects all social activities.

Biology and physiology
The biological aspects of humans' sexuality deal with human reproduction and the physical means with which to carry it out(sexual intercourse). They also deal with the influence of biological factors on other aspects of sexuality, such as organic and neurological responses, heredity, hormonal issues, gender issues and sexual dysfunction.

For the sake of reproduction, normally a male will stimulate a woman until she is ready to have sex. Then he will penetrate her vagina with his penis. After repeated thrusts of his midsection and buttocks—causing the penis to partially retract from, then reenter, the vagina—the man will ejaculate his semen. This may lead to insemination, which may lead to pregnancy.

During this time there are many other biological changes which have little or nothing to do with reproduction and can be generalized to any sexual act, not just that between a man and a woman. These include, increase in body temperature, increase in levels of pleasurable hormones.

Psychological aspects
Sexuality in humans generates profound emotional and psychological responses. Some theorists identify sexuality as the central source of human personality.

Psychological studies of sexuality focus on psychological influences that affect sexual behavior and experiences. Early psychological analyses were carried out by Sigmund Freud, who believed in a psychoanalytic approach. He also conjectured the concepts of erogenous zones, psychosexual development, and the Oedipus complex, among others.

Behavior theorists such as John B. Watson and B. F. Skinner examine the actions and consequences and their ramifications. These theorists would, for example, study a child who is punished for sexual exploration and see if they grow up to associate negative feelings with sex in general. Social-learning theorists use similar concepts, but focus on cognitive activity and modeling.

Gender identity is a person's own sense of identification as female, male, both, neither, or somewhere in between. The social construction of gender has been discussed by a wide variety of scholars, Judith Butler notable among them. Recent contributions consider the influence of feminist theory and courtship research.

Sociocultural aspects
Human sexuality can also be understood as part of the social life of humans, governed by implied rules of behavior and the status quo. This focus narrows the view to groups within a society. The sociocultural aspect examines influences on and from social norms, including the effects of politics and the mass media. Such movements can help to bring about massive changes in the social norm — examples include the sexual revolution and the rise of feminism.

The link between constructed sex meanings and racial ideologies has been studied. Sexual meanings are constructed to maintain racial-ethnic-national boundaries, by denigration of "others" and regulation of sexual behavior within the group. "Both adherence to and deviation from such approved behaviors, define and reinforce racial, ethnic, and nationalist regimes."

The age and manner in which children are informed of issues of sexuality is a matter of sex education. The school systems in almost all developed countries have some form of sex education, but the nature of the issues covered varies widely. In some countries (such as Australia and much of Europe) "age-appropriate" sex education often begins in pre-school, whereas other countries leave sex education to the pre-teenage and teenage years. Sex education covers a range of topics, including the physical, mental, and social aspects of sexual behavior.

Religious sexual morality
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., which have sought to guide people's sexual activities and practices.

Sexual behavior
Human sexual behavior, driven by the desire for pleasure, encompasses the search for a partner or partners, interactions between individuals, physical, emotional intimacy, and sexual contact that may lead to foreplay, masturbation and ultimately orgasm.

Human sexual activities or human sexual practices or human sexual behavior refers to 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 biological, physical and emotional aspects. Biologically, it refers to the reproductive mechanism as well as the basic biological drive that exists in all species and can encompass sexual intercourse and sexual contact in all its forms. Emotional aspects deal with the intense personal bonds and emotions generated between sexual partners by a sexual activity. Physical issues around sexuality range from purely medical considerations to concerns about the physiological or even psychological and sociological aspects of sexual behaviour.

In humans, sex has been claimed to produce health benefits as varied as improved sense of smell, stress and blood pressure reduction, increased immunity, and decreased risk of prostate cancer. Sexual intimacy, as well as orgasms, increases levels of the hormone oxytocin, also known as "the love hormone", which helps people bond and build trust. A long-term study of 3,500 people between 30 and 101 by clinical neuropsychologist David Weeks, MD, head of old age psychology at the Royal Edinburgh Hospital in Scotland, found that "sex helps you look between four and seven years younger", according to impartial ratings of the subjects' photos. Exclusive causation, however, is unclear, and the benefits may be indirectly related to sex and directly related to significant reductions in stress, greater contentment, and better sleep that sex promotes.

In contrast to its benefits, sexual intercourse can also be a disease vector. There are 19 million new cases of sexually transmitted diseases (STD) every year in the U.S., and worldwide there are over 340 million STDs a year. More than half of all STDs occur in adolescents and young adults aged 15–24 years. At least one in four U.S. teenage girls has a sexually transmitted disease. In the US, about 30% of 15–17 year old adolescents have had sexual intercourse, but only about 80% of 15–19 year old adolescents report using condoms for their first sexual intercourse. More than 75% of young women age 18–25 years felt they were at low risk of acquiring an STD in one study.

Sexual attraction
Sexual attraction is an important aspect of the sexuality of the person being observed, as well as of the person observing. Each person determines the qualities that they find attractive, which vary from person to person. A person's sexual orientation has a significant influence on which qualities they will find attractive. The qualities that people can find sexually attractive may depend on the physical quality, including both looks and movements of a person but can also be influenced by voice or smell as well as by individual preferences resulting from a variety of genetic, psychological, and cultural factors.

Creating a relationship


People both consciously and subconsciously seek to attract others with whom they can form deeper relationships. This may be for companionship, for procreation, for an intimate relationship, besides other possible purposes. This involves interactive processes whereby people find and attract potential partners, and maintain a relationship. These processes, which involve attracting a partner and maintaining sexual interest, can include:


 * Flirting can be used to attract the sexual attention of another in order to encourage romance or sexual relations, and can involve body language, conversation, joking or brief physical contact.
 * Seduction is the process whereby one person deliberately entices another to engage in some sort of human sexual behavior. The medium of communication of sexual interest can be verbal or visual.
 * Dating is the process of arranging meetings or outings with a potential partner to investigate or enhance their suitability for an intimate partnership.
 * The prospect of physical intimacy is, at times, the most effective means of sexual attraction. This can be by way of an expression of feelings such as close friendship or love, including holding hands, hugging, kissing, or caressing.

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, 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.

Child sexuality
In the past, children were often assumed not to have sexuality until later development. Sigmund Freud was one of the first researchers to take child sexuality seriously. While his ideas, such as psychosexual development and the Oedipus conflict, have been rejected or labeled obsolete, acknowledging the existence of child sexuality was a milestone. Alfred Kinsey also examined child sexuality in his Kinsey Reports. Children are naturally curious about their bodies and sexual functions. For example, they wonder where babies come from, they notice anatomical differences between males and females, and many engage in genital play (often mistaken for masturbation). Child sex play includes exhibiting or inspecting the genitals. Many children take part in some sex play, typically with siblings or friends. Sex play with others usually decreases as children go through their elementary school years, yet they still may possess romantic interest in their peers. Curiosity levels remain high during these years, but it is not until adolescence that the main surge in sexual interest occurs.

Sexuality in late adulthood
Changes in sexual behavior occur with age and while humans in late adulthood may be impaired by infirmity, relationship needs such as closeness and sensuality remain. Aging produces changes in sexual performance. Men are more likely to experience these changes than women. For men, orgasms become less frequent and usually need more direct stimulation to produce an erection. One out of four men, ages 65 to 80, had severe problems getting or keeping erections and this percentage increased with men over 80 years of age. Yet, the use of drugs to treat erectile dysfunction increases the expectations of older adults to have sex. Despite medical complications and opinions that people in late adulthood should be asexual, many older adults continue to engage in sexual intercourse. The results of a recent interview study involving 3,000 adults 57 to 85 years of age have shown that health plays a role in the level of older adults' sexual activity. The percentage of sexually active older adults is higher for those that are in good health than those in poor health. Older women may be less sexually active due to outliving their partners or men's tendency to marry younger women. While older adults engage in sexual activity, intimacy and companionship tend to be more important than sex.

Sexuality in history
Art and artifacts from past eras help to portray human perception of sexuality of the time.

Ancient civilizations
Many of the ancient civilisations provide evidence of developments in sexuality. In particular:
 * Egypt: The couple Khnumhotep and Niankhkhnum, now buried in a joint Fifth-dynasty (2498–2345 BC) era tomb in Saqqara, Egypt, are believed to be the oldest recorded same-sex couple in human history. The Ancient Egyptians related the cult of phallus with Osiris. When Osiris' body was cut in 13 pieces, Set scattered them all over Egypt and his wife Isis retrieved all of them except one, his penis, which was swallowed by a fish (see the Legend of Osiris and Isis). The phallus was a symbol of fertility, and the god Min was often depicted ithyphallic (with a penis).


 * India: Ancient texts from Hinduism, Buddhism and Jainism such as the Vedas reveal moral perspectives on sexuality, marriage and fertility prayers. The epics of ancient India, the Ramayana and Mahabharata, possibly from as early as 1400 BC, later influenced Chinese, Japanese, Tibetan and South East Asian culture. They indicate that sex was considered a mutual duty between a married couple, but where sex was considered a private affair. The most publicly known sexual literature of India are the texts of the sixty-four arts.
 * Mesopotamia: In ancient Mesopotamia, Ishtar was the primary Goddess of life, men and women, nature and fertility, sex, sexual power and birth. Ishtar was also the goddess of war and weapons and any victory was celebrated in her temples with offerings of produce and money as well as through a feast and orgy of sex and intercourse with holy temple prostitutes.
 * China: In the I Ching (The Book of Changes, a Chinese classic text dealing with what would be in the West termed metaphysics), sexual intercourse is one of two fundamental models used to explain the world. Heaven is described as having sexual intercourse with Earth. The male lovers of early Chinese men of great political power are mentioned in one of the earliest great works of philosophy and literature, the Zhuang Zi.
 * Japan: In perhaps the earliest novel in the world, the Genji Monogatari (Tale of Genji), dating back to around the 11th century AD, eroticism is treated as a central part of the aesthetic life of members of the nobility.
 * Greece: In ancient Greece, the phallus, often in the form of a herma, was an object of worship as a symbol of fertility. One ancient Greek male idea of female sexuality was that women envied penises of males. Wives were considered as commodity and instruments for bearing legitimate children. They had to compete sexually with eromenoi, hetaeras and slaves in their own homes.
 * Rome: Ancient Roman civilization included celebrations associated with human reproductive organs. Over time there emerged institutionalization of voluntary sex as well as prostitution. This resulted in a virtual sexual caste system in Roman civilization – different grades and degrees of sexual relationships. Apart from the legally wedded spouses, a number of males used to have Delicatue, mistresses of wealthy and prominent men. The next were the Famosae, mostly the daughters and even wives of the wealthy families who enjoyed sex for its own sake. There was another class known as Lupae, willing to have sexual union with anyone for a price. Copae were the serving girls in the taverns and inns and who did not mind being hired as bedmates for the night by travelers.

Modern developments
In contemporary academia, sexuality is studied in the fields of sexology and gender and sexuality studies, among many other fields.

Sexology, the study of sexual interests, behavior, and function, covers sexual development and sexual relationships including sexual intercourse. It also documents the sexualities of groups such as the disabled, children, and the elderly.

Alfred Kinsey became interested in the different forms of sexual practices around 1933 when he developed the Kinsey Scale, which ranges from 0 to 6, where 0 is exclusively heterosexual and 6 is exclusively homosexual. His Kinsey Reports starting with the publication of Sexual Behavior in the Human Male in 1948 and Sexual Behavior in the Human Female in 1953 contributed to the sexual revolution of the 1960s.