Sexual intercourse wikipedia

Sexual penetration is the insertion of a body part or other object into a body orificesuch as the mouthvagina or anusas part of human sexual activity or sexual behavior in non-human animals, sexual intercourse wikipedia. The term is most commonly used in statute law in the sexual intercourse wikipedia of proscribing certain sexual activities.

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.

Sexual intercourse wikipedia

Penile vaginal intercourse or vaginal intercourse is a form of sexual intercourse in human sexuality , in which an erect penis is inserted in a vagina. It corresponds to mating or copulation in non-human animals. Some of the synonyms are used for other variants of sexual intercourse as well. The desire for sensual pleasure is usually the main motivation for humans, and sometimes the wish to have a baby or more children. During coitus without condom , sperms enter the vagina, first with the pre-ejaculate and then a larger amount through male ejaculation. Sperm swim through the cervix and the uterus into the fallopian tubes of the woman. If they meet a fertilisable egg cell after or during an ovulation , or if an ovulation occurs hours or days later, one sperm can fertilize it. The resulting zygote develops into the early embryonic stages and, in the meantime, migrates from the fallopian tube into the uterus. The nidation of the embryo called blastocyst at this stage of development with the beginning of the production of hCG marks the beginning of a pregnancy. For people who do not want another child, contraception has made it possible to separate vaginal intercourse from its biological function of procreation. Since there is no mating season estrus in humans, the partners can have penile-vaginal intercourse distributed over the menstrual cycle regardless of the time of ovulation, even when the woman is already pregnant and after the menopause. Couples who wish to have offspring can avail themselves of the tests for sexually transmitted infections recommended by the WHO , so that after ruling out or treating any detected infection they can have penile-vaginal intercourse without using a condom. There are currently more than 7. The increasing proportion of people conceived through intrauterine insemination and in vitro fertilisation is still comparatively small.

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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.

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Sexual intercourse wikipedia

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In vertebrates, they are produced within the ovaries. The resulting zygote develops into the early embryonic stages and, in the meantime, migrates from the fallopian tube into the uterus. 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. Various forms of penetration have at times been considered obscene and been prohibited. Like animals, land plants have specialized male and female gametes. Gilbert; Daniel M. The Biology of Reproduction. Gender binary Gender identity Men who have sex with men Sexual identity Sexual orientation Women who have sex with women. In non-hermaphroditic species, the sex of an individual is determined through one of several biological sex-determination systems. If the stretching capacity of the vagina is exceeded by a too large penis, pain and inflammation will result.

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In clownfish , smaller fish are male, and the dominant and largest fish in a group becomes female; when a dominant female is absent, then her partner changes sex. Pregnancy rates for sexual intercourse are highest during the menstrual cycle time from some 5 days before until approximately one day after ovulation this is sometimes called the ' fertile window '. These gametes combine to form embryos which develop into new organisms. These laws refer to grandparents, parents, children, siblings, aunts and uncles. ISSN Many animals that live in water use external fertilization , whereas internal fertilization may have developed from a need to maintain gametes in a liquid medium in the Late Ordovician epoch. Retrieved 10 July Humans and most other mammals have an XY sex-determination system : the Y chromosome carries factors responsible for triggering male development, making XY sex determination mostly based on the presence or absence of the Y chromosome. Rather, it is a complex reaction in which all organ systems of the human body are involved. The Sex Lives of Teenagers. Sexual selection rut Lordosis behavior Homosexual behavior Canid African wild dog coyote dingo domestic dog gray wolf red fox Dolphin Elephant European badger Felidae lion tiger cheetah domestic cat Fossa Hippopotamus Spotted hyena Marsupial kangaroo Pinnipeds walrus Primates human bonobo gorilla olive baboon mandrill ringtailed lemur sexual swelling Raccoon Rodent Short-beaked echidna. Sometimes sexual intercourse is called coitus , copulation , mating , or fornication , and is more casually known as having sex or sleeping together.