High heel pornography involves naked milf women or men dressed in high heeled shoes. Anti-pornography psychologist Ana Bridges and colleagues conducted a content analysis of best-selling heterosexual pornographic videos showing that over 96% of all scenes concluded with a male performer ejaculating onto the body of his female partner. Facial cum shots are currently regularly portrayed in pornographic films and videos, often as a way to close a scene. Targets the male audience, but is much less popular than Yaoi. Homi Bhabha defined the idea of a racial fetish in contrast to the idea of the Freudian sexual fetish which he describes a denial of difference, where the male sees the female as a castrated male, seeing missing parts rather than a different anatomy. Going back at least as far as the Christy twins in the 1970s, depictions of incest and particularly incest between twins has been a feature of gay pornography. Amateur porn has been called one of the most profitable and long-lasting genres of pornography. These typically are leaked to the public via the Internet, with or without lesbian hentai the celebrity consent. In pornography, depictions of lesbian sex form a popular subgenre, directed toward a male heterosexual and female homosexual audience. It may be used as foreplay, or as an alternative to sexual penetration. Participants usually derive pleasure from this, even though many of the practices—such as inflicting pain or humiliation or being restrained—would be unpleasant under other circumstances. This is also the case in many relationships not considering themselves as sadomasochistic; it is considered to be a part of BDSM if it is practiced purposefully. Consent is the hot gay sex most important criterion here. Unlike erotic films, pornographic films contain explicit sexuality and do not claim any artistic merit. When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. The first pegging scene appears to have been in the non-pornographic 1970 film Myra Breckinridge, based on the novel of the same name by Gore Vidal, although it was not explicit.