As well as traditional attraction, the topic also incorporates feederism and gaining, where sexual gratification is obtained via the process of gaining body fat. Group sex also occurs in populations of non-human animals such as bonobo apes and chimpanzees. Although videos gays there may be no connection between coprophilia and sadomasochism , the limited data on the former comes from studies of the latter. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. In humans, females generally have more round and voluptuous buttocks, caused by estrogen that encourages the body to store fat in the buttocks, hips, and thighs. Arcane or occult pornography involves sexualized situations with an occult or magical tone or performers who costume themselves in keeping with the theme, for example, a male performer dressed as a wizard. It may occur more frequently in private situations, such as spontaneous sexual activity among three friends, or arranged in a community of like-minded swingers or planned as a once-only experience; and rarely in anonymous settings, such as at orgies or other sex parties. Creampie, also known as internal cum shot, and, in homosexual contexts, also known as breeding and seeding, is a slang term used milf xxx in pornography to describe when a male ejaculates inside his partner vagina or anus. The purpose of this kind of agreement is primarily to encourage discussion and negotiation in advance, and then to document that understanding for the benefit of all parties. By comparison, gonzo pornography puts the camera right into the action, often with one or more of the participants both filming and performing sexual acts, without the usual separation between camera and performers seen in conventional porn and cinema. Ass to mouth is a slang term primarily used to describe the withdrawal of a penis from the receptive partner anus followed by the immediate lesbian hentai insertion into the receptive partner mouth. The primary subjects of pornographic depictions are pornographic models, who pose for still photographs, and pornographic actors or porn stars, who perform in pornographic films.