Enema pornography involves adults given enemas to others, often fake. The sub-genres usually conform to certain conventions, and each may appeal to a particular audience. This style of filming is in contrast to having a separate, third-person camera crew filming all the action. Sex experts have praised various techniques that the performer can use during fellatio to increase their partner pleasure. In pornography, depictions of lesbian sex form a popular subgenre, directed toward a male heterosexual milf fuck and female homosexual audience. Sexual scenarios may involve male domination, female submission, exhibitionism gay sex video and erotic entertainment. First found in softcore movies and erotic thrillers, depictions of lesbianism entered mainstream cinema in the 1980s. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, or attraction to particular stages of pregnancy such as impregnation or childbirth. Ethnic pornography is a genre of pornography that features performers of specific ethnic groups, or depictions of interracial anime hentai sexual activity. Lesbianism has been a theme in erotic art since at least the time of ancient Rome, and many regard depictions of lesbianism to be erotic. A female dominant in a master/slave relationship is often termed a Mistress, not to be confused with the colloquial usage of mistress as a kept sexual partner without a similarly formalized power relationship. In many cases, that person is also aroused by smelling body parts that have a urine scent. The terms can be complimentary or pejorative. Men and women may masturbate until they are close to orgasm, stop for a while to reduce excitement, and then resume masturbating. Other possibilities are possible, such as a man having sex with two women who are having sex with each other. Fisting pornography features the insertion of an entire hand into a performer vagina or anus. Pornography in the early 2000s. Simultaneous penetration of the mouth and either the vagina or anus.