Boots are seen as the perhaps most fetishistic of all footwear and boots may be the most popular fetish clothing attire. Perhaps following the example set by gay pornography, they have become a popular subgenre within heterosexual pornography since the turn of the century, featuring both vaginal and anal ejaculations. A scene where many women have sex with one man is referred to as a reverse gang-bang. Some people masturbate by using machines that simulate intercourse. Biological anthropologist Helen B. Medical pornography involves sexualized medical, often fake, including gynecological pelvic examinations, rectal examinations, and pelvic or gynecological ultrasounds. The phrase buttered bun is sometimes used to refer to the owner of the orifice in question. In 1988, a sex tape caused significant damage to Rob Lowe career. Bukkake pornography involves a performer, usually female, onto whom several men or women ejaculate, usually on the face. Clothed male, naked female is one-sided female nudity in which one or more females are nude while hentai porn one or more men are clothed. Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and lesbian milfs their buttocks are objectified by porn as a result. Today, religions vary in their views of masturbation; some view it as a spiritually detrimental practice, some see it as not spiritually detrimental, and others take a situational view. Irrespective of the legal or social view of pornography, it has been gaysex used in a number of contexts. Some straight actors have started acting in gay porn only to be accused of being gay while others first step was to strictly do solo scenes. Pussing: British expression for an activity involving a consenting couple where the male partner watches the woman urinate otherwise undetected in a semi-public place, usually a toilet cubicle at a pub, hotel, restaurant, theatre/cinema, office, club etc. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy.