Sexual intercourse wikipedia

Sexual intercourse or simply called sex is the insertion and thrusting of a male's penis into a female's vagina. Sometimes sexual intercourse is called coituscopulationmatingor fornicationand is more casually known as having sexual intercourse wikipedia or sleeping together. The two animals may be of opposite sexes or they may be hermaphroditicas is the case with snails, sexual intercourse wikipedia. Humans sometimes engage in behaviors that do not include the penetration of sexual organssuch as oral intercourse or anal intercourse or by non-sexual organs fingeringfisting.

Human sexual activity , human sexual practice or human sexual behaviour is the manner in which humans experience and express their sexuality. People engage in a variety of sexual acts, ranging from activities done alone e. Sexual activity usually results in sexual arousal and physiological changes in the aroused person, some of which are pronounced while others are more subtle. Sexual activity may also include conduct and activities which are intended to arouse the sexual interest of another or enhance the sex life of another, such as strategies to find or attract partners courtship and display behaviour , or personal interactions between individuals for instance, foreplay or BDSM. Sexual activity may follow sexual arousal.

Sexual intercourse wikipedia

Sex is the trait that determines whether a sexually reproducing organism produces male or female gametes. By convention, organisms that produce smaller, more mobile gametes spermatozoa , sperm are called male , while organisms that produce produce larger, non-mobile gametes ova , often called egg cells are called female. In non-hermaphroditic species, the sex of an individual is determined through one of several biological sex-determination systems. Most mammalian species have the XY sex-determination system , where the male usually carries an X and a Y chromosome XY , and the female usually carries two X chromosomes XX. Other chromosomal sex-determination systems in animals include the ZW system in birds, and the XO system in insects. Various environmental systems include temperature-dependent sex determination in reptiles and crustaceans. The male and female of a species may be physically alike sexual monomorphism or have physical differences sexual dimorphism. In sexually dimorphic species, including most birds and mammals, the sex of an individual is usually identified through observation of that individual's sexual characteristics. Sexual selection or mate choice can accelerate the evolution of differences between the sexes. The terms male and female typically do not apply in sexually undifferentiated species in which the individuals are isomorphic look the same and the gametes are isogamous indistinguishable in size and shape , such as the green alga Ulva lactuca.

This system is used by birds, some fish, and some crustaceans.

Sexual intercourse also coitus or copulation is sexual activity involving the insertion and thrusting of the male penis inside the female vagina for sexual pleasure , reproduction , or both. There are different views on what constitutes sexual intercourse or other sexual activity, which can impact on views of sexual health. Various jurisdictions place restrictions on certain sexual acts, such as incest , sexual activity with minors , prostitution , rape , zoophilia , sodomy , premarital and extramarital sex. Religious beliefs also play a role in personal decisions about sexual intercourse or other sexual activity, such as decisions about virginity , [13] [14] or legal and public policy matters. Religious views on sexuality vary significantly between different religions and sects of the same religion, though there are common themes, such as prohibition of adultery. Reproductive sexual intercourse between non-human animals is more often called copulation , and sperm may be introduced into the female's reproductive tract in non-vaginal ways among the animals, such as by cloacal copulation. For most non-human mammals , mating and copulation occur at the point of estrus the most fertile period of time in the female's reproductive cycle , which increases the chances of successful impregnation.

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Sexual intercourse wikipedia

Human sexual behavior refers to all the ways in which humans experience and live their sexuality. It includes acts done alone, for example masturbation , and acts done with a partner. Not all acts done with a partner are about sexual intercourse. All these acts usually result in sexual arousal. Human sexual activity can also include things done to find new partners, or to attract their attention for example courtship.

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Page Talk. Human sexual activity is generally influenced by social rules that are culturally specific and vary widely. Platypus egg cells all have five X chromosomes, whereas sperm cells can either have five X chromosomes or five Y chromosomes. Archives of Sexual Behavior. The Orgasm Answer Guide. Retrieved 18 September Sexual functioning has been regularly identified as a neglected area of the quality of life in patients with rheumatoid arthritis. New York: The Guilford Press. This sex-determination system results in highly biased sex ratios , as the sex of offspring is determined by fertilization arrhenotoky or pseudo-arrhenotoky resulting in males rather than the assortment of chromosomes during meiosis. However, the law is more concerned with protecting the rights of people who are potentially subjected to such abuse. Journal of Sex Research. It gives a submissive pleasure to do things in general for their Dominant while a Dominant enjoys making their encounters all about their submissive and enjoy doing things that makes their submissive happy.

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file. File:Unprotected human sexual intercourse with natural insemination.

For copulation among other animals, see Copulation zoology. In: The Journal of Urology. A sex ratio is the ratio of males to females in a population. Archived from the original on 2 March Main articles: Sexual abuse , Rape , and Sexual assault. Hidden categories: Webarchive template wayback links Source attribution Articles with short description Short description matches Wikidata Wikipedia indefinitely move-protected pages Wikipedia indefinitely semi-protected pages Use dmy dates from August All articles with unsourced statements Articles with unsourced statements from November Commons category link from Wikidata Articles with LNB identifiers Articles with NKC identifiers Articles with HDS identifiers. In: The Journal of Sexual Medicine. The condition affects up to one-fifth of women at some point in their lives. National Institutes of Health, " V. Think again — Sexual Fitness — physiology". Researchers commonly use sexual intercourse to denote penile—vaginal intercourse while using specific words, such as anal sex or oral sex , for other sexual behaviors. Infobase Publishing. 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. Louis, MO: Mosby. He then stores the sperm in reservoirs on his large pedipalps , from which he transfers sperm to the female's genitals.