Clothed female, naked male is a genre of erotica featuring one or more nude men and one or more clothed women. Technically this is a form of exhibitionism rather than group sex per se. Pornographic films are generally classified into sub-genres which describe the sexual fantasy which the film and actors attempt to create. Going back at least as far as the Christy twins in the 1970s, depictions of incest and particularly incest between twins has been a feature of gay pornography. Others involve partners who naturally have a significant difference in size. To tea bag anime hentai is a slang term for the sexual act of a man placing his scrotum in the mouth of a willing sexual partner for pleasure or onto gay sex video the face or head of another person. In some societies, the terms fox, plum, chick, or chicken are preferred. Erotic literature and pornographic films have nude milfs been devoted to the sexual uses of glory holes. The term has as its origins Frantz Fanon epidermal schema and Edward Said Orientalism. Voyeur or peeping Tom pornography is usually more staged with the subjects aware of the cameras, sometimes openly including this exhibitionist awareness. Freud, however, considered such extensions of sexual interest to fall within the range of the normal, unless marked out by exclusivity . Jail/Prison/Police pornography involves people in police custody or inmates in jails or prisons in various sexual situations, such as strip searches or body cavity searches. The effect is to give the viewer the sense that they are experiencing the sex acts that they are watching, as opposed to simply watching others as a voyeur. In the context of consensual erotic activities, sadism and masochism are not strictly accurate terms; there is a significant difference from the medical or psychological usage of both terms. In these cases, the appearance of an enlarged abdomen caused by obesity or overeating may be sufficient, or simply the suggestion of a protruding navel. One-sided male nudity can also arise when a male disrobes as part of a male striptease.