However the genre remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies. The effect is to give the viewer the sense that they are experiencing the sex acts that they are watching, as opposed to simply watching others as a voyeur. There is a substantial amount of incest pornography on the Internet, leading some to argue it may legitimize or encourage real-life incest. Most consumers of bisexual pornography do not identify as gay. The term has as its origins Frantz Fanon epidermal schema and Edward Said Orientalism. Given the wide range of practices, some of which may be engaged in by people who do not consider themselves as practicing BDSM, inclusion in the BDSM community or subculture is usually dependent on self-identification and shared experience. Teacher and Student or Boss and Secretary pornography involves sexualized situations which take place between an authority figure, such as a teacher or boss, and an underling, such as a student or secretary, often fake. They may repeat this cycle multiple hentai movies times. Solo pornography features performers masturbating. Simultaneous young gay porn penetration of the vagina by two penises or other objects. Gang bang pornography is a type of pornography that depicts an individual engaging in physical sexual activity with multiple partners mature milfs sequentially or at once. Sexual scenarios may involve male domination, female submission, exhibitionism and erotic entertainment. This is sometimes the case for punishment scenes between master/slave couples or for some extreme or edgeplay scenes which may include abductions, rape play, or interrogation. As of 2010, they were reported to live together as a monogamous couple outside of their porn careers and want to continue working together for another 50 years. Regardless of its origin, BDSM is used as a catch-all phrase to include a wide range of activities, forms of interpersonal relationships, and distinct subcultures. Yuri is the lesbian equivalent. In terms of physical pleasure, a woman genitals may get direct stimulation from the base of the dildo, or in the case of a double-ended dildo, from vaginal penetration.