Sex in film is the inclusion of a presentation in a film of sexuality. Since the development of the medium, inclusion in films of any form of sexuality has been controversial. Some films containing sex scenes have been criticized by religious groups or have been banned or the subject of censorship by governments, or both. In countries with a film rating system, films containing sex scenes typically receive a restricted classification. Nudity in film may be regarded as sexual or as non-sexual.
An erotic film is usually a film that has an erotic quality that causes the creation sexual feelings, as well as a philosophical contemplation concerning the aesthetics of sexual desire, sensuality and romantic love. Love scenes, erotic or not, have been presented in films since the silent era of cinematography. A pornographic film, on the other hand, is a sex film which does not usually claim any artistic merit. Sex scenes have been presented in many genres of film; while in other genres, sexuality is rarely depicted. Many actors and actresses have performed nude/partial nude scenes, as well as dress and behave in ways considered sexually provocative by contemporary standards at some point in their careers.
Sex in film can be distinguished from a sex film, which usually refers to a pornographic film and sometimes to a sex education film. It should also be distinguished from nudity in film, though nudity can be presented in a sexualized context. For example, nudity in the context of naturism would normally be regarded as non-sexual. Some people distinguish between "gratuitous sex" and sex scenes which are presented as integral to a film's plot or as part of the character development.
Sex scenes are the main feature of pornographic films. In softcore films, sexuality is less explicit. Erotic films are suggestive of sexuality, but need not contain nudity.