In pornography, depictions of lesbian sex form a popular subgenre, directed toward a male heterosexual and female homosexual audience. The prostate gland is one of the organs that contributes fluid to semen. Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, mutilation, urine, enemas, or feces. Enema pornography involves adults given enemas to others, often fake. English adopts and uses hentai as a genre of pornography by the commercial sale and marketing of explicit works under this label. The scenario is a genre of erotica, which on the internet is sometimes abbreviated to CMNF, and may involve sexual and nonsexual erotic scenarios. Bhabha, Anne McClintock and Kobena gay bear porn Mercer. Mutual masturbation is a sexual act where two or more people stimulate themselves or one another sexually, usually with the hands. A common way that horny milfs these are depicted in a single scene is with one woman and two men performing together. Animal masturbation has been observed in many species, both in the wild and in captivity. Emetophilia pornography involving vomiting and gagging. There is also some evidence that pornography can be used to treat voyeurism. When sexual activity is centered on one of the threesome, then the activity may be described as a gang 3d hentai bang of the person. For uncircumcised males, stimulation of the penis in this way comes from the pumping of the foreskin, in which the foreskin is held and slid up and down over the glans, which depending on foreskin length, is completely or partially covered and then uncovered in a rapid motion. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person. Since development and pronunciation of the buttocks begins at menarche and declines with age, full buttocks are also a symbol of youth. By Japanese law, the genitals of actors and actresses must be censored and up the mid-1990 so was the depiction of pubic hair.