The current public acceptance of celebrities with sex tapes is speculated by Joe Levy, executive editor of Rolling Stone, to be due to the easy availability of pornography, as well as couples more commonly making their own tapes due to the prevalence of video cameras. 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. In general, BDSM play is usually structured such that it is possible for the consenting partner to withdraw his or her consent during a scene; for example, by using a safeword that was agreed on in advance. The term bondage nude milfs describes the practice of Physical restraining. In POV porn, the shooting style is generally similar to gonzo pornography, with the person receiving sexual gratification holding the camera him or herself—aiming it down at the actress or actor who is performing the sex act. However, bisexual pornography is often placed near the gay section in adult video stores, since many consumers are gay men. For example, in Australia it is rated Refused Classification . In the West, masturbation gay twinks in private or with a partner is generally considered a normal and healthy part of sexual enjoyment. John Stagliano is considered to have started the gonzo pornography genre with his Buttman series of films. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre. Is also common hentai sex of the furry genre. Many fantasies include the macrophile shrinking before a normal sized woman or keeping his or her normal height while the partner grows in size.