A sex party is a gathering at which sexual activity takes place. Bukkake pornography involves a performer, usually female, onto whom several men or gay movies women ejaculate, usually on the face. When anime hentai used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. Yuri : Featuring two grown adult women in a homosexual/lesbian relationship. Reality and voyeur pornography, animated videos, and legally prohibited acts also influence the classification of pornography. For instance, Amateur big tit milf Allure has a trademark shot where the sexually performing cameraman circles a handycam around the sexually performing model head. Testosterone discourages fat storage in these areas. 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. In humans, females generally have more round and voluptuous buttocks, caused by estrogen that encourages the body to store fat in the buttocks, hips, and thighs. Sigmund Freud considered foot binding as a form of fetishism. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. 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. In Canada, Teletoon offers up its own Teletoon at Night programming block. The term BDSM dates back to 1969; however, the origin of the term BDSM is unclear and is believed to have been formed either from joining the term B&D with S&M , or as a compound initialism from B&D, D&S , and S&M. This is commonly called double vaginal penetration or double stuffing. Pro-am pornography is sub-genre of amateur pornography that refers to professionally made porn that features amateur actors/actresses, often appearing for the first time in a pornographic film.