Heterosexual bareback sex, as opposed to sex with condoms, not only poses an increased risk of STIs, but for pregnancy as well. Other possibilities are possible, such as a man having sex with two women who are having sex with each other. Originating in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography. Such hentai sex explicit sexual interaction is seen only rarely in public play spaces, and it is sometimes specifically banned by the rules of a party or playspace. It is mutual consent that makes a clear legal and ethical distinction between BDSM and such crimes as sexual assault or domestic violence. The rise of the Internet in the late 1990s and early 2000s similarly changed the way pornography film was distributed and furthermore complicated the censorship regimes around the world and the legal prosecution of obscenity. Lesbian pornography made for women is usually made by women, and usually features women who identify as lesbian or bisexual. Cuckold fetish pornography that involves a cuckolded husband. Usually that person prefers to stage the wetting so that his/her legs become soaked with urine. Lesbianism has been a theme in erotic art since at least the time of ancient Rome, and many regard depictions of lesbianism to be erotic. Although pornography has usually focused on heterosexuality, due to the prevalence of the heterosexual orientation, explicit gay material has a long history as well, which reaches back to Greek antiquity, if not to prehistory. This fetish sometimes originates from childhood memories of needing, or of seeing another needing, to urinate. Bisexual pornography is a genre of pornography which most typically depicts one woman and two men who all perform sex acts on each other. A celebrity may allow such a recording to surface willingly, as milf fuck part of a publicity stunt. The concept of lesbian, to differentiate women with a shared sexual orientation, is a 20th-century gay movies construct. A variant of A2M is ATOM where a performer inserts his penis directly from one recipient anus into a second recipient mouth.