Sexual intercourse, also called sex, coitus or copulation, is an intimate social activity that typically involves insertion of the erect penis into the vagina, followed by thrusting, for erotic pleasure, reproduction or both. Other penetrative forms, including anal sex, oral sex, fingering and the use of dildos or vibrators, are also recognized. Definitions vary across cultures, laws and researchers, which affects how sexual health is understood. Health professionals recommend safer sex practices because these activities can transmit sexually transmitted infections.
Definitions and terms
The word coitus derives from Latin and usually denotes penile-vaginal penetration, while copulation more often describes mating in non-human animals. Many terms, slang words and euphemisms exist, and their meanings differ between languages. Researchers have criticized the tendency to equate sex with penile-vaginal intercourse, arguing that this assumption can overlook other forms of sexual activity and limit how rape is understood.
Social and legal aspects
Various jurisdictions restrict certain sexual acts, including adultery, incest, sexual activity with minors, prostitution and rape. Religious beliefs also influence personal decisions about sexual intercourse, such as decisions about virginity, as well as legal and public policy matters. Views on sexuality differ widely between religions and sects, although some shared themes, such as the prohibition of adultery, appear across many traditions.