Mutual masturbation, mutual manual stimulation of the genitals between partners, can be a substitute for sexual penetration. 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. A scene where many women have sex with one man is referred to as a reverse gang-bang. Cartoon pornography depicts illustrated horny milfs or animated fictional characters in erotic and sexual situations. Group sex most commonly takes place in a private sex party or semi-public swinger gathering, but may also take place at massage parlors or brothels or, in some jurisdictions, at purpose-built locations such as sex clubs. Use of the agreed safeword is seen by some as an explicit withdrawal of consent. Evolutionary psychologists hentai porn suggest that rounded buttocks may have evolved to be desirable trait because they provide a visual indication of the woman youth and fertility. Detective magazines, comic books and early fetish magazines In the early 20th century, Detective magazines covertly provided a way of publishing bondage imagery. Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result. Works in this genre may explore philosophical, political or social issues. Following the introduction of the Motion Picture Association of America film rating system, independent animation producers attempted to establish an alternative to mainstream animation. Bear features a combination of middle-aged, gay fuck hairy or overweight males. The first explicit pegging scene is believed to have been in the 1975 pornographic film The Opening of Misty Beethoven. Bondage pornography specializes in the depiction of sexual bondage or BDSM activities as photographs, stories, movies, or drawings. A woman can use a secondary vibrator, between the dildo and her genitals, to get pleasure from pegging.