Real enema shots or videos of true medical situations may violate privacy laws in some countries. Dwarfs or midget pornography features performers who are dwarfs/midgets. In general, BDSM play is usually structured such that it is possible for the consenting partner to withdraw his or her consent during a scene; for example, by using a safeword that was agreed on in advance. Bisexual pornography is a genre of pornography mature milfs which most typically depicts one woman and two men who all perform sex acts on each other. A celebrity may allow such a recording to surface willingly, as part of a publicity stunt. For legal reasons, the vast majority gay fuck of so-called reality porn involves professional actors and actresses posing as so-called amateurs. 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. Bobbi S. Transsexual porn star Wendy Williams has stated that transsexual Porn is classified as Straight Specialty. The genres of pornography are based on the type of activity featured and the category of participants, for example mateur pornography is a category of pornography that features models, actors or non-professionals performing without pay, or actors for whom this material is their only paid modeling work. Creampie scenes depart from heterosexual pornographic convention in favor of a depiction that more closely mimics sexual intercourse as performed in ordinary life; they have been called the counterimage of facials. For instance, Amateur Allure has a trademark shot where the sexually performing cameraman circles a handycam around the sexually performing model head. 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. 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 hentai movies physical act, so as to arouse quick intense reactions.