The inside of a smotherbox is often padded to provide support for their neck and prevent their head from moving. The existence of such content in commercially available pornography is widely considered an urban legend. The term hentai is never used in this context in Japanese. Since the 1980s, many practitioners and organizations have adopted the motto safe, sane and consensual, commonly abbreviated as SSC, which means that everything is based on safe activities, that all participants be of sufficiently sound/sane mind to consent, and that all participants do consent. There has been an increase in discussion and portrayal of masturbation in art, popular music, television, films, and literature. 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. It is used, for example, at fertility clinics to stimulate sperm donors. Transgender pornography features performers who cross-dress for sexual gratification, either for themselves or for their partners. Pornography momporn in the early 2000s. Most soft crush fetishists avoid being placed under the same label as hard crush fetishists, believing that crush films with larger animals give the entire group a bad label. Some techniques which may work for one individual can be difficult or uncomfortable for another. Group gay movies sex is sexual behavior hentai movies involving more than two participants. The most common type of erotic spanking is administered on the bare buttocks, but can also be combined with bondage, in order to heighten sexual arousal and feelings of helplessness. Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination. Internal ejaculations, followed by images of semen dripping from the anus, are sometimes depicted in bareback gay pornography, where they are referred to by the term breeding or the reverse money shot. 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.