Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, mutilation, urine, enemas, or feces. The name of the practice, when it is done in a repeated in-and-out motion, is derived from its passing resemblance to the dipping of a tea bag into a cup of hot water as a method of brewing tea. Pegging is a sexual practice in which a woman performs anal sex on a man by penetrating the man anus with a strap-on dildo. As in B/D, the declaration of the Top/Bottom may be required, though sadomasochists may also play without any Power Exchange at all, with both partners equally in control of the play. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. This technique may include the use of a simulacrum, or artificial vagina. Hugo Ohira, director of marketing for Silvercash, rhetorically asks Who does not like spewing their load on a pretty young face? Another variant of reality pornography consists of normal couples that are filmed by professionals, in which case the only obvious distinction from amateur pornography is the higher quality of production, filming and editing. Arousal may be triggered by seeing the body movements or facial expressions of that person. In human sexuality, a threesome is sexual activity that involves three people at the same time. Can also include auto-fellatio, gay movies or performing oral sex on oneself. Sex experts have praised various techniques that hentai movies the performer can use during fellatio to increase their partner pleasure. Pornographic films are generally classified into sub-genres which describe the sexual fantasy which the film and actors attempt to create. Using the term shemale for a transsexual woman often implies that she is working in the sex trade. Group sex is sexual behavior involving horny milfs more than two participants. The original definition of dogging – and which is still a closely related activity – is spying on couples having sex in a car or other public place.