If dramatic skills are not involved, a performer in a porn film may also be called a model. 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. Portrayals of lesbians in the media suggest that society at large has been simultaneously intrigued and threatened by women who challenge feminine gender roles, and fascinated and appalled with women who are romantically involved with other women. Sexual relations between women have been illustrated as well as narrated, but much of the written material from the early modern period has been destroyed. For legal reasons, the vast majority of so-called reality porn involves professional actors and actresses posing as so-called amateurs. Transsexual pornography is a genre of pornography. Pornography in Japan is large and intertwined business of adult entertainment with unique characteristics that readily distinguish it from western pornography. Examples of heterosexual pornographic film series featuring creampies include Cream Filled Teens and Internal Cumbustion. 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. The most common type of erotic spanking is administered gay boy porn on the bare buttocks, but can milf fuck also be combined with bondage, in order to heighten sexual arousal and feelings of helplessness. Hardcore pornography is pornography that depicts penetration or extreme fetish acts, or both. It is used, for example, at fertility clinics to stimulate sperm donors. The full-weight body-pressure, moisture, sex odors and darkness can be perceived as powerful sexual attractions or compulsions. Fisher said that perhaps, the fleshy, rounded buttocks attracted males during rear-entry gay hentai intercourse. It is sometimes combined with BDSM features. 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.