Simultaneous penetration of the mouth and either the vagina or anus. Pornography may be presented in a variety of media, including books, magazines, postcards, photographs, sculpture, drawing, painting, animation, sound recording, film, video, and video games. Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, mutilation, urine, enemas, or feces. Emetophilia pornography involving vomiting and gagging. Other possibilities are possible, such as a man having sex with two women who are having sex with each other. The person receiving anilingus is regarded as the passive partner in the act, and the person performing anilingus is momsex the active partner. English adopts and uses hentai as a genre of pornography by the commercial sale and marketing of explicit works under this label. 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. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person. Gloryhole pornography features women performing fellatio on unidentified men through a small hole made in a bathroom divider. Mutual masturbation is a sexual act where two or more people stimulate themselves or one another sexually, usually with the hands. Real enema shots or hentai videos videos of true medical situations may violate privacy laws in some countries. Men may find stimulation of the anus, rectum, and adjacent organs enjoyable. These scenes may either have the cameraman directly engaging in sex or merely filming others having sex. 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 gay cock and editing. 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.