When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. Voyeurism: Seeing another urinate without the person knowledge either through video taping by a hidden camera, or by lurking in locations where people are urinating or are likely to have an urge to urinate. Especially popular in post-World War 2 Japanese culture. A few extremely flexible males can reach and hentai videos stimulate their penis with their tongue or lips, and so perform autofellatio. Emetophilia pornography involving vomiting and gagging. Performers are usually milf fuck clean-shaven, thinner and more effeminate than ones in mainstream gay pornography. Another variant of reality pornography consists of normal couples that are filmed by professionals, in which case the only obvious distinction from amateur pornography is the higher quality of production, filming and editing. The work of Bruce Seven has been called reality porn, due to his lack of using scripts and asking his performers to act naturally in their own character. In pornography, depictions of lesbian sex form a popular subgenre, directed toward a male heterosexual and female homosexual audience. Women porn is often produced by women and aimed specifically at the female market - rejecting the view that men are turned on by porn but women only by a box of chocolates. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. The term Asiaphile is sometimes used to describe the same phenomenon as is yellow fever . Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . The padding may also muffle noises from the outside, causing a relaxation effect and heightening their other senses. The phrase is gaysex commonly found on porn sites. The inside of a smotherbox is often padded to provide support for their neck and prevent their head from moving.