For instance, Amateur Allure has a trademark shot where the sexually performing cameraman circles a handycam around the sexually performing model head. Typically featured are hitting, choking, name-calling and hair-pulling. The phrase buttered bun is sometimes used to refer to the owner of the orifice in question. The original definition of dogging – and which is still a closely related activity – is spying on couples having sex in a car or other public place. Sadomasochism is practiced in isolation relatively rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation. Pornography may fall into more than one genre. The niche popularity grew significantly in the latter half of the first decade of the 2000s. Evolutionary psychologists suggest that rounded buttocks may have evolved to be desirable trait because they provide a visual indication of the woman youth and fertility. This can, however, redirect semen into the bladder . This stop and go build-up, known as edging, can achieve even stronger orgasms. Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of both sexes. Softcore gay pornography also exists; it at one time constituted the genre, and may be produced as beefcake pornography for heterosexual female and homosexual male consumption. The range of its individual momporn characteristics gay movies is thereby wide. Clothed male, naked female is one-sided female nudity in which one or more females are nude while one or more men are clothed. Hardcore pornography is pornography that depicts penetration or extreme fetish hentai sex acts, or both. Hamedori is a genre of Japanese pornography in which a male adult video actor or director serves as the camera operator. Rainbow parties were covered on The Oprah Winfrey Show in 2003, and became the subject of a juvenile novel called Rainbow Party. Lolita pornography features women who are 18 years old or slightly older, who pretend to be underage teen girls.