Sexual intercourse wikipedia

Human sexual activityhuman 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 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 coitus , copulation , mating , or fornication , and is more casually known as having sex or sleeping together. The two animals may be of opposite sexes or they may be hermaphroditic , as is the case with snails. Humans sometimes engage in behaviors that do not include the penetration of sexual organs , such as oral intercourse or anal intercourse or by non-sexual organs fingering , fisting. These behaviors are sometimes included in the definition of sexual intercourse. Two animals coming together for the purposes of sexual reproduction is called mating. Most mammals only mate when the female is at the point of estrus , which is the most fertile period of time in its reproductive cycle.

Sexual intercourse wikipedia

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. Sexual intercourse may be called coitus , copulation , coition , or intercourse. Coitus is derived from the Latin word coitio or coire , meaning "a coming together or joining together" or "to go together", and is known under different ancient Latin names for a variety of sexual activities, but usually denotes penile—vaginal penetration. Although sex and "having sex" also most commonly denote penile—vaginal intercourse, [26] sex can be significantly broad in its meaning and may cover any penetrative or non-penetrative sexual activity between two or more people. Penetration of the vagina by the erect penis is additionally known as intromission , or by the Latin name immissio penis Latin for "insertion of the penis".

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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.

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. Sexual activity has many different forms. Commonly, sexual activity involves foreplay , [1] which is the act of making the partner feel good.

Sexual intercourse wikipedia

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Series B: Biological sciences. The most common reason was that they put the man's pleasure above their own and tended toward submissiveness during sex. Sperm Archived 29 June at the Wayback Machine. Bibcode : PNAS.. S2CID Many species of higher fungi produce mushrooms as part of their sexual reproduction. It is the most frequently studied behavior and is often the focus of sexuality education programming for youth. PLOS Biology. Meiosis", U. Springer Publishing Company. Main article: Homosexuality. Consensual sexual intercourse is not always an option for some. Retrieved October 8, Forcing someone to have sex who does not want to, called rape , is a serious crime in many countries. And they also agree that the main difference between the two is gamete size: males make lots of small gametes—sperm in animals, pollen in plants—and females produce a few big eggs.

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Sexually Transmitted Infections E book. The findings indicate that the surveyed submissives and Dominants found BDSM makes play more pleasurable and fun. When a fertile ovum from the female is present in the fallopian tubes, the male gamete joins with the ovum, resulting in fertilization and the formation of a new embryo. CiteSeerX The man-above, or "missionary," position is the most common sex position. One group of individuals has large sex cells, and it is convenient to use the word female for them. The same problem can occur with a relatively short vagina. June Relative to other animals, human mating strategies are unique in their relationship with cultural variables such as the institution of marriage. Archived from the original on 26 October Mammal species with extreme sexual size dimorphism tend to have highly polygynous mating systems—presumably due to selection for success in competition with other males—such as the elephant seals. In birds, which have a ZW sex-determination system , the W chromosome carries factors responsible for female development, and default development is male. The Plant Cell. There remains a lack of "dialogue around this population's human right to consensual sexual expression, undertreatment of menstrual disorders, and legal and systemic barriers". Authority control databases.