Although there may be no connection between coprophilia and sadomasochism , the limited data on the former comes from studies of the latter. The Silent Duck, also called Duck-Billing, is the technique often used in which the person engaging in hand insertion shapes the hand to resemble a duck beak. Because the viewing of such films carried a social stigma, they were viewed at brothels, adult movie theaters, stag parties, at home, in private clubs and also at night cinemas. Today, pornographic films can be sold or rented on DVD, shown through Internet and special channels and pay-per-view on cable and satellite, and in adult theaters. The term combines elements of the Freudian psychoanalytic fetish and the Marxist commodity fetish, and is used in the context of British, Spanish mature milfs and French colonialism and imperialism and their aftereffects. Many cultures describe pain as an aphrodisiac. John Stagliano is considered to have started the gonzo pornography gay hentai genre with his Buttman series of films. Bukkake pornography involves a performer, usually female, onto whom several men or women ejaculate, usually gay sex video on the face. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. 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. Normal quantities of ejaculate range from 1.5 to 5.0 milliliters . Women with women Main article: Lesbianism in erotica: Lesbianism in contemporary pornography Lesbian or girl-girl pornography features women engaged in sex together, but is typically aimed at a male audience. In Japan, point of view pornography is referred to as hamedori . Incest itself is largely taboo, and is a crime in many countries. Testosterone discourages fat storage in these areas.
