In pornography, depictions of lesbian sex form a popular subgenre, directed toward a male heterosexual and female homosexual audience. Masturbation has been depicted in art since prehistoric times and is mentioned and discussed in very early writings. The most common depiction of a hermaphrodite is a person with a female face, breasts, and build, and a penis , although there are other combinations. Performers are usually clean-shaven, thinner and more effeminate than ones in mainstream gay pornography. Pornographic films or sex films are films that present sexually explicit subject matter for the purpose of sexual arousal and erotic satisfaction of the viewer. This is why video stores might consider stocking transgendered subject matter in the straight section, as some straight men will have passive or active sex with another man as long as their partner appears to look like a woman to them, to some minor or major degree. By Japanese law, the genitals of actors and actresses must be censored and up the mid-1990 so was milf xxx the depiction of pubic hair. Interracial pornographic films have experienced an explosion in popularity, becoming one of the fastest-growing and biggest-selling genres. Can also include auto-fellatio, or performing oral sex on oneself. The speed of the hand motion will vary from person to person, although it is not uncommon for the speed to increase as ejaculation nears and for it to decrease during the ejaculation itself. Now facial cumshots are regularly portrayed in pornographic films, videos, magazines and internet web sites. Japanese rope bondage is distinguished by its use of specific katas and aesthetic rules. Fantasies of hentai videos group sex are extremely common among both men and women, and group sex is a subgenre in pornographic videos gays films. Interracial pornography typically employs ethnic and racial stereotypes in its depiction of performers and many of interracial pornographic films still include racial stereotypes, although the segregation of actors by race has diminished considerably.