This industry employs thousands of performers along with support and production staff. Pornography in the early 2000s. Transgender pornography features performers who cross-dress for sexual gratification, either for themselves or for their partners. Adult animation is genre of animation geared towards adults and sometimes teens. The Silent Duck, also called Duck-Billing, is the technique often used in which the person engaging in hand insertion shapes the hand to resemble a duck beak. Usually that person prefers to stage the wetting so that his/her legs become soaked with urine. Voyeurism: Seeing another urinate without the person knowledge 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. It is commonly depicted in pornography, but very rarely in mainstream cinema. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. This style of filming is in contrast to having a separate, third-person camera crew filming all the action. Babysitter pornography features usually teenage girls being exploited and having taboo sex with older, male employers. Related genres hentai movies include: Amateur pornography originally referred only to pornography produced by amateurs but now also includes professionally made pornography designed to appear momsex as if it were amateur. Often, strong views are expressed with regard to anal sex; it is controversial in various cultures, especially with regard to religion, commonly due to prohibitions against anal sex among gay men or teachings about the procreative purpose of sexual activity. Diaper pornography involves performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. Bobbi S. Simultaneous penetration of the mouth and either the vagina or anus. Advocates gay sex video of RACK argue that SSC can hamper discussion of risk because no activity is truly safe, and that discussion of even low-risk possibilities is necessary for truly informed consent.