Sexual intercourse wikipedia

Human sexual activityhuman sexual practice or human sexual behaviour is the sexual intercourse wikipedia in which humans experience and express their sexuality. People engage in a variety of sexual acts, ranging from activities done alone e.

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.

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".

There are differences between states in terms of the severity of punishments and what they consider to be a relative, including biological parents, step-parents, adoptive parents and half-siblings.

Sexual penetration is the insertion of a body part or other object into a body orifice , such as the mouth , vagina or anus , as part of human sexual activity or sexual behavior in non-human animals. The term is most commonly used in statute law in the context of proscribing certain sexual activities. Terms such as " sexual intercourse " or " carnal knowledge " are more commonly found in older statutes, while many modern criminal statutes use the term "sexual penetration" because it is a broad term encompassing unless otherwise qualified any form of penetrative sexual activity, including digital i. Some jurisdictions refer to some forms of penetration as "acts of indecency ", or other terminology. When a penis is inserted into a vagina, it is generally called vaginal sex , vaginal intercourse, [1] [2] or penis-in-vagina PIV sex.

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. From Wikimedia Commons, the free media repository. File information. Structured data. Captions Captions English Sexual intercourse with Insemination. Summary Description Human Intercourse. The video ends with penis ejaculation.

Sexual intercourse wikipedia

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:Sexual intercourse in the woman on top position. This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. Summary Description Sexual intercourse in the woman on top position. I, the copyright holder of this work, hereby publish it under the following license:.

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Sexually transmitted infections STIs are bacteria , viruses or parasites that are spread by sexual contact, especially vaginal, anal, or oral intercourse, or unprotected sex. In pines and other conifers , the sex organs are produced within cones that have male and female forms. Human sexual activity , human sexual practice or human sexual behaviour is the manner in which humans experience and express their sexuality. In human societies, sex ratios at birth may be considerably skewed by factors such as the age of mother at birth [68] and by sex-selective abortion and infanticide. Amer, R. See also: Sexual coercion among animals. Retrieved October 13, Archived from the original on February 4, University of Toronto Press. Toggle limited content width. The Handy Anatomy Answer Book. Unlike the usual "power neutral" relationships and play styles commonly followed by couples, activities and relationships within a BDSM context are often characterized by the participants' taking on complementary, but unequal roles; thus, the idea of informed consent of both the partners becomes essential.

Sexual arousal is the feeling humans and animals get when they are ready to have sexual intercourse. Someone who can only get sexually aroused after forming an emotional bond with someone is called a demisexual. Animal sexuality is not very well understood today, but scientists are sure that animals do get sexually aroused without having sexual intercourse.

Petri; John M. Street kids: the lives of runaway and thrownaway teens. Clinical Manual of Sexual Disorders. Cambridge University Press. This is interpreted to mean that vaginal intercourse is physiologically more satisfying. In: pghcitypaper. Robert Francoeur et al. Bondage includes the restraint of the body or mind. Many reptiles , including all crocodiles and most turtles, have temperature-dependent sex determination. The stimulation triggers rhythmic, involuntary contractions in smooth muscle in the male reproductive tract, especially the vas deferens and the prostate. Retrieved June 20, Homosexuality is the romantic or sexual attraction to the same sex. In birds, males often have a more colorful appearance and may have features like the long tail of male peacocks that would seem to put them at a disadvantage e.