Breeding is sometimes followed by felching, lesbian milfs which involves sucking the semen from the partner anus. No causal relationship is known between masturbation and any form of mental or physical disorder. Some aspects of the research community distinguish between female ejaculation and what is colloquially known as squirting or gushing. Although there may be hentai videos no connection between coprophilia and sadomasochism , the limited data on the former comes from studies of the latter. Other fetish Bareback pornography features performers who are not wearing condoms. Shotacon videos gays : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12. Bukkake pornography involves a performer, usually female, onto whom several men or women ejaculate, usually on the face. Works in this genre may explore philosophical, political or social issues. 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. Gonzo pornography is a style of pornographic film that attempts to place the viewer directly into the scene. The initialism BDSM includes psychological and physiological facets: Bondage & Discipline Dominance & Submission Sadism & Masochism Types of Play This model for differentiating among these three aspects of BDSM is increasingly used in literature today. Voyeur pornography may also include shots of topless women on topless beaches who are unaware of the cameras but may legally be photographed due to the public setting. The study also found that participants reacted positively to a much wider range of figures than a control group, even rating emaciated figures higher. Studies among BDSM practitioners in the US have shown that about half of all men find the idea of bondage to be erotic; many women do as well. However, gay pornography in the modern world is mostly concentrated in the making of home videos , cable broadcast and emerging video on demand and wireless markets, as well as images and movies for viewing on the Internet.