For some people, non-penetrative sex is the primary sexual activity of choice above all others. The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre. Such ejaculation can be done by mammary intercourse, or masturbation over the other person, or result from the withdrawal of the penis from a partner mouth as he is ejaculating following fellatio, irrumatio, or intercourse. The term combines elements of the Freudian psychoanalytic fetish and the Marxist commodity fetish, and is used in the context of British, Spanish and French colonialism and imperialism and their aftereffects. The object or situation of interest is called the fetish; the person who has a fetish for that object/situation is a fetishist. Adult animation is genre of animation geared towards adults and sometimes teens. Examples of heterosexual pornographic film series featuring creampies include Cream Filled Teens and Internal Cumbustion. While anal sex is commonly associated with male homosexuality, research shows that not all gay males engage in anal sex and that it is not uncommon in heterosexual momsex relationships. Types of anal sex can also be a part of lesbian anime hentai sexual practices. Sadomasochism is practiced in isolation relatively gaysex rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation. Since the 1980s, many practitioners and organizations have adopted the motto safe, sane and consensual, commonly abbreviated as SSC, which means that everything is based on safe activities, that all participants be of sufficiently sound/sane mind to consent, and that all participants do consent. Femdom features BDSM scenes in which the dominant partner is female. Jerk off instruction features a performer encouraging or instructing the viewer to masturbate, often culminating in a countdown at the end of which the viewer is invited to induce orgasm.