Some productions are noted for sophisticated and/or experimental storytelling and animation techniques. In pornography, depictions of lesbian sex form a popular subgenre, directed toward a male heterosexual and female homosexual audience. 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. As in B/D, the declaration of the Top/Bottom may be required, though sadomasochists may also play without any Power Exchange at all, with both partners equally in control of the play. For other diaper fetishists, simply wearing a diaper, the bulking feeling and crinkling sounds associated with it, gay bear porn is enough to cause the fetishist a form of erotic pleasure or sexual arousal. One or more of the participants may engage in autoerotic sexual activity, such as masturbation, possibly without physical contact with the other participants. A facial is a form of non-penetrative sex, though it is generally performed after some other means of sexual stimulation, such as vaginal sex, anal sex, oral sex or masturbation. Some restrict a policy of panties/nipple tape for females and some allow full nudity with explicit sexual interaction allowed. Gloryhole pornography features women performing fellatio on unidentified men through a small hole made in a bathroom big tit milf divider. Softcore gay pornography also exists; it at one time constituted the genre, and may be produced as beefcake pornography for heterosexual female and homosexual male consumption. The consent and compliance for a sadomasochistic situation can be granted only by people who can judge the potential 3d hentai results. Such films continued to be produced but could only be distributed by underground channels. Lesbian pornography made for women is usually made by women, and usually features women who identify as lesbian or bisexual. However the genre remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies.
