Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, mutilation, urine, enemas, or feces. Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . English adopts and uses hentai as a genre of pornography by the commercial sale and marketing of explicit works under this label. Mutual masturbation is a sexual act where two or more people stimulate themselves or one another sexually, usually with the hands. The term applies to the depiction of the act rather than the act itself, and so does not include live exhibitions like sex shows and striptease. There is also some evidence that pornography can be used to treat voyeurism. Amateur porn has been called one of the most profitable and long-lasting genres of pornography. Women porn is often produced by women and aimed specifically at the female market - rejecting the view that men are turned on by porn but women only by a box of chocolates. A crush fetish is a fetish in which one is sexually aroused usually when someone crushes objects, food, and sometimes small animals with their body, usually under their foot, or when crushed oneself. 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 momsex Greek antiquity, if not to prehistory. Even though the performers who perform in these films typically appear on many reality websites within a short span of time, most of these websites claim that each of them is an amateur. Reflective of its views on sexuality and culture, Japanese pornography delves into a wide spectrum of heterosexual, homosexual, hentai sex and transgender sexual acts in addition to unique fetishes and philias. Rough sex pornography is similar to pornography featuring sadomasochism, and typically features a Top who humiliates and/or degrades a Bottom while being physically violent videos gays towards them. The current record is held by Lisa Sparks who had sex with 919 men on October 16, 2004 in Warsaw, Poland as part of the Third Annual World Gangbang Championship and Eroticon 2004.