Patricia Cumshots Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result. Coprophilia , also called scatophilia or scat , is the paraphilia involving sexual arousal and pleasure from feces. In Japan, point of view pornography is referred to as hamedori . Positions can also be chosen gay boy porn specifically for added effects such as increased humiliation, elevation and suspension. Cartoon pornography includes, but is not limited to, hentai and parody renditions of famous cartoons and comics. Lying face down one may use the hands, one may straddle a pillow, the corner or edge of the bed, a partner leg or some scrunched-up clothing and hump the vulva and clitoris against it. A study of the condom usage habits of New Zealand sex workers said that they offered various best mobile porn safe sex alternatives to vaginal sex to clients who refused to wear a condom. It has since become popular enough with couples to be discussed during an episode of Sex and the City. Such works have also often been subject to censorship and other legal restraints to publication, display or possession. The cover can have hinges or be a separate part. No causal relationship is known between masturbation anime hentai and any form of mental or physical disorder. By comparison, gonzo pornography puts the camera right into the action, often with one or more of the participants both filming and performing sexual acts, without the usual separation between camera and performers seen in conventional porn and cinema. The industry generally refers to such films as adult films, which is part of adult entertainment. The term has also applied to other professions and even companies trying to appeal to a gay demographic. In the 18th and 19th centuries, some European theologians and physicians described it as heinous, deplorable, and hideous, but during the 20th century, these taboos generally declined. Its gain in prominence has been attributed to its depiction in momsex the film Pecker, which was released in 1998.