Targets the male audience, but is much less popular than Yaoi. Films with risqué content commenced to be produced soon after the invention of the motion picture in the 1880s. Voyeurism: Seeing another urinate without the person knowledge gaysex either through video taping by a hidden camera, or by lurking in locations where people are urinating or are likely to have an urge to urinate. Because the viewing of such films carried hentai sex a social stigma, they were viewed at brothels, adult movie theaters, stag parties, at home, in private clubs and also at night cinemas. In modern BDSM vernacular, the queening stool allows open access to the crotch while seated. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person. As of 2013, little analysis of this paraphilia has been reported in medical literature. Some restrict a policy of panties/nipple tape for females and some allow full nudity with explicit sexual interaction allowed. Heterosexual bareback sex, as opposed to sex with condoms, not only poses an increased risk of STIs, but for pregnancy as well. Such films continued to be produced but could only be distributed by underground channels. Interracial pornography typically employs ethnic and racial stereotypes in its depiction of performers and many of interracial pornographic films still include racial stereotypes, although the segregation of actors by race has diminished considerably. It may be used as foreplay, or as an alternative to sexual penetration. In addition to mainstream pornography, the popularity of facials has led to creation of its own niche market, like video series that specialize in showing the act. Gay-for-pay describes male or female actors, pornographic stars, or sex workers who self-identify as heterosexual but who naked milf are paid to act or perform as homosexual professionally. Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity.