Real jail or prison or police station shots or videos may violate laws in some countries. The work of Bruce Seven has been called reality porn, due to his lack of using scripts and asking his performers to act naturally in their own character. The first pegging scene appears to have been in the non-pornographic 1970 film Myra Breckinridge, based on the novel of the same name by Gore Vidal, although it was not explicit. Some productions are noted for sophisticated and/or experimental storytelling and animation techniques. The first film was released in 1980 starring Kay Parker. The anus has a relatively high concentration of nerve endings and can be an erogenous zone, and the receiver may receive pleasure from external anal stimulation. A female dominant in a master/slave relationship is often termed a Mistress, not to be confused with the colloquial usage of mistress as a kept sexual partner without a similarly formalized power relationship. Amateur porn has been called one of the most profitable and long-lasting genres of pornography. Babysitter pornography features usually teenage girls being exploited and having taboo sex with older, male employers. Bukkake, Gokkun, Omorashi, and tentacle erotica are few uniquely Japanese genres known to western viewers. An orgy is a gathering where guests freely engage in open and unrestrained sexual activity or group sex; and a bunga bunga orgy is an orgy in which participants have sex underwater, such as in a swimming pool or a hot tub. Now facial cumshots are regularly portrayed in pornographic films, videos, magazines and internet web sites. Internal ejaculations, gay porn followed by images of semen dripping from the anus, are sometimes depicted in bareback gay pornography, where they are referred to by the term breeding or the reverse money shot. Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . Fantasies of group sex are extremely common among both men and women, and group sex is a subgenre in pornographic films.