Other possibilities are possible, such as a man having sex with two women who are having sex with each other. Actual spying may violate privacy and/or trespassing laws in many countries. It has also been recommended as a form of foreplay or safer sex. 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. Diaper pornography involves lesbian milfs performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. Clothes wetting: The person is sexually aroused by wetting one clothing or observing another person doing so. Shibari is a Japanese word that literally means to tie or to bind. Since the 1980s, many practitioners and organizations have adopted the motto safe, sane and consensual, commonly abbreviated as SSC, which means that everything is based on safe activities, that all participants be of sufficiently sound/sane mind to consent, and that all participants do consent. Films with risqué content commenced to be produced soon after the invention of the motion picture in the 1880s. Target audience are teenage / young adult women. Transsexual pornography features transwomen performers, who typically have male genitalia and augmented female breasts . Real enema shots or videos of true medical situations may violate privacy laws in some countries. In modern BDSM vernacular, the queening stool allows open access to the crotch while seated. Women that take on the roles of the giantess within this fetish often find the practice to be empowering and enjoy being worshiped. Unlike erotic films, pornographic films contain explicit sexuality and do not claim any artistic merit. Lesbian pornography lesbian hentai made for women is usually made by women, and videos gays usually features women who identify as lesbian or bisexual. Because the viewing of such films carried a social stigma, they were viewed at brothels, adult movie theaters, stag parties, at home, in private clubs and also at night cinemas.