It may also involve touching, gay bear porn rubbing, or pinching the nipples or other erogenous zones while masturbating. 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, horny milfs where the male sees the female as a castrated male, seeing missing parts rather than a different anatomy. Along with the penis, the scrotum is sensitive and considered to be an erogenous zone. Examples include the Girls hentai movies Gone Wild and Girls Who Like Girls Series. 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. Related genres include: Amateur pornography originally referred only to pornography produced by amateurs but now also includes professionally made pornography designed to appear as if it were amateur. Shibari is a Japanese word that literally means to tie or to bind. Gloryhole pornography features women performing fellatio on unidentified men through a small hole made in a bathroom divider. Snuff pornography involves the actual death of any of the participants, consenting or otherwise, simulated death is not considered snuff. Matsuo used amateur actresses in his videos, and he usually traveled to their hometowns for the filming. These agreements are binding in the sense that the parties have the expectation that the negotiated rules will be followed. Clothed female, naked male is a genre of erotica featuring one or more nude men and one or more clothed women. Some productions are noted for sophisticated and/or experimental storytelling and animation techniques. Entacle erotica describes a type of pornography most commonly found in Japan which integrates traditional pornography with elements of bestiality and a fantasy, horror, or science-fiction theme. Heterosexual bareback sex, as opposed to sex with condoms, not only poses an increased risk of STIs, but for pregnancy as well.