As women, they face concerns separate from men. Although there may be no connection between coprophilia and sadomasochism , the limited data on the former comes from studies of the latter. The queening stool is also related to a smotherbox, which also allows the person under the seat to be locked in place, restrained by the neck as in a set of stocks. There are number of types of sex parties: Swinger party/gathering A swinger party or partner-swapping party is a gathering at which individuals or couples in a committed relationship can engage in sexual activities with others as a recreational or social activity. Pornographic films are typically categorized as either softcore or hardcore pornography. Today, pornographic films can be sold or rented on DVD, shown through Internet and special lesbian milfs channels and pay-per-view on cable and satellite, and in adult theaters. The industry generally refers to such films as adult films, hentai videos which is part of adult entertainment. Common positions include lying on back or face down, sitting, squatting, kneeling or standing. Voyeur pornography may also include shots of topless women on topless beaches who are unaware of the cameras but may legally be photographed due to the public setting. Diaper fetishism is totally independent from pedophilia as the wearer derives pleasure only from the diaper and/or use of it. The term bondage describes the practice gay sex video of Physical restraining. If one person is penetrated by two objects, it is generically called double penetration . What seems clear from the historical record is that much of the lesbian material in pornographic texts was intended for a male readership. For a foot fetishist, points of attraction include the shape and size of the foot and toes , jewelry , treatments , state of dress , odor, and sensory interaction . Boots are seen as the perhaps most fetishistic of all footwear and boots may be the most popular fetish clothing attire. Buttocks are sometimes emphasized in pornography, where they are often referred to as booty.