Some men also enjoy anal stimulation, with fingers or otherwise, without any prostate stimulation. Other possibilities are possible, such as a man having sex with two women who are having sex with each other. Adult animation is genre of animation geared towards adults momsex and sometimes teens. Pornography in the early hot gay sex 2000s. Both forms of pornography generally contains nudity. Its primary goal is sexual arousal in its audience. Though there have been numerous gang bang pornographic films since the 1980s, they usually involved no more than half a dozen to a dozen men. Diaper pornography involves performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. Men may also rub or massage the glans, the rim of hentai movies the glans, and the frenular delta. Related genres include: Amateur pornography originally referred only to pornography produced by amateurs but now also includes professionally made pornography designed to appear as if it were amateur. Femdom features BDSM scenes in which the dominant partner is female. There is no singular or archetypical behavior; therefore, a wide range of thought patterns and behaviors exist, but all tends to be a harmless and efficacious release from some kind of pressure. In human sexuality, a threesome is sexual activity that involves three people at the same time. It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. Originating in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography. Pegging is a sexual practice in which a woman performs anal sex on a man by penetrating the man anus with a strap-on dildo. A crush fetish is a fetish in which one is sexually aroused usually when someone crushes objects, food, and sometimes small animals with their body, usually under their foot, or when crushed oneself. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions.