Regardless of its origin, BDSM is used as a catch-all phrase to include a wide range of activities, forms of interpersonal relationships, and distinct subcultures. In the United States, creating, distributing, or possessing crush videos has been illegal since 1999, and many other countries also have banned them. Dogging is a British English slang term for engaging in sexual acts in a public or semi-public place or watching others doing so. Some couples use pornography at times for variety and to create lesbian milfs a sexual interest or as part of foreplay. However, that term is usually applied to a male who observes somebody secretly and, generally, not in a public place. POV pornography involves camera angles designed to provide the viewer a view similar to that seen by one of the participants, whose face is never shown. 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. Bondage can also be achieved by spreading the appendages and fastening them with chains to a St. As observation is encouraged, gay hentai voyeurism and exhibitionism are closely associated with dogging. Some diaper wearers wear their diapers for limited amounts of time, while others prefer to wear them on a 24-hour, seven-day schedule. The most established and probably most cliché set form of dominance and submission is Dominance and slavery. Fetish cuckolding can have a wide range of expression, from pillow-talk fantasy between monogamous gay bear porn partners to extreme alternative lifestyles, depending on the couple. In the 1920s, Havelock Ellis reported that turn-of-the-century seamstresses using treadle-operated sewing machines could achieve orgasm by sitting near the edge of their chairs. Most consumers of bisexual pornography do not identify as gay. In a bath or shower a female may direct tap water at her clitoris and vulva. Cum swapping pornography involves performers trading semen between their mouths. For example, the Kama Sutra, in particular, goes into specific detail on how to properly strike a partner during sex.