Group sex is sexual behavior involving more than two participants. Group sex can occur amongst people of all sexual orientations and genders. Group sex also occurs in non-human animals such as bonobo apes and chimpanzees.
Group sex most commonly takes place in a private sex party or semi-public swinger gathering, but may also take place at massage parlors or brothels or, in some jurisdictions, at purpose-built locations such as sex clubs. In places where non-monogamous sex is taboo or illegal, group sex may take place in private or clandestine locations, including homes, hotel rooms, or private clubs.