Sexual activity, sexual practice, sexual behaviour or, very broadly, sex is the set of activities people engage in that typically includes any combination of physical intimacy, physical contact with the reproductive organs (genitals) or erogenous zones, and erotic stimulation. Sexual acts range from activities done alone (e.g., masturbation) to acts with another person (e.g., sexual intercourse, non-penetrative sex, oral sex, etc.) or multiple persons (e.g., orgies) in varying patterns of frequency, for a wide variety of reasons. Sexual activity usually results in sexual arousal and physiological changes in the aroused persons, some of which are pronounced while others are more subtle. Certain conduct is intended to arouse the sexual interest of another or enhance one's already-existing sex life with another or between individuals (for instance, foreplay or BDSM). Certain activities, such as strategies to find or attract partners (flirting, courtship and display behaviour), are not usually considered sex, though they are commonly used to lead to sexual arousal and more explicitly sexual activities. Human sexual activity has sociological, cognitive, emotional, behavioural and biological aspects. It involves personal bonding, sharing emotions, the physiology of the reproductive system, sex drive, sexual intercourse, and sexual behaviour in all its forms. In some cultures, sexual activity is considered acceptable only within marriage, while premarital and extramarital sex are taboo. Some sexual activities are illegal either universally or in some countries or subnational jurisdictions, while some are considered contrary to the norms of certain societies or cultures. Two examples that are criminal offences in most jurisdictions are sexual assault and sexual activity with a person below the local age of consent.
Types Sexual activity can be classified in a number of ways. The practices may be preceded by or consist solely of foreplay. Acts involving one person (autoeroticism) may include sexual fantasy or masturbation. If two people are involved, they may engage in vaginal sex, anal sex, oral sex or manual sex. Penetrative sex between two people may be described as sexual intercourse, but definitions vary. If there are more than two participants in a sex act, it may be referred to as group sex. Autoerotic sexual activity can involve use of dildos, vibrators, butt plugs, 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. 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 or BDSM activities. Fetishism can take many forms, including the desire for certain body parts (partialism) such as breasts, navels, or feet. The object of desire can be shoes, boots, lingerie, clothing, leather or rubber items. Some non-conventional autoerotic practices can be dangerous. These include autoerotic 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. Sexual activity that is consensual is sexual activity in which both or all participants agree to take part and are of the age that they can consent. If sexual activity takes place under force or duress, it is considered rape or another form of sexual assault. In different cultures and countries, various sexual activities may be lawful or illegal in regards to the age, gender, marital status or other factors of the participants, or otherwise contrary to social norms or generally accepted sexual morals.
Mating strategies
In evolutionary psychology and behavioral ecology, human mating strategies are a set of behaviors used by individuals to attract, select, and retain mates. Mating strategies overlap with reproductive strategies, which encompass a broader set of behaviors involving the timing of reproduction and the trade-off between quantity and quality of offspring (see life history theory). Relative to other animals, human mating strategies are unique in their relationship with cultural variables such as the institution of marriage. Humans may seek out individuals with the intention of forming a long-term intimate relationship, marriage, casual relationship, or friendship. The human desire for companionship is one of the strongest human drives. It is an innate feature of human nature, and may be related to the sex drive. The human mating process encompasses the social and cultural processes whereby one person may meet another to assess suitability, the courtship process and the process of forming an interpersonal relationship. Commonalities, however, can be found between humans and nonhuman animals in mating behavior.
Stages of physiological arousal during sexual stimulation
The physiological responses during sexual stimulation are fairly similar for both men and women and there are four phases.
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