A female dominant in a master/slave relationship is often termed a Mistress, not to be confused with the colloquial usage of mistress as a kept sexual partner without a similarly formalized power relationship. It like associating every Christian with the zealots who cause religious wars. BDSM actions can often take place during a specific period of time agreed to by both parties, referred to as play, a scene or a session. Actual spying may violate privacy and/or trespassing laws in many countries. 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. A facial is a form of non-penetrative sex, though it is generally performed after some other means of sexual stimulation, such as vaginal sex, anal sex, oral sex or masturbation. Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games. 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 Greek antiquity, if not to prehistory. As with most forms of sexual activity, anal sex participants risk contracting sexually transmitted infections . Bukkake, Gokkun, Omorashi, and tentacle hentai videos erotica are few uniquely Japanese genres known to western viewers. Now facial cumshots are regularly portrayed in pornographic films, lesbian milfs videos, magazines and internet web sites. Women in homosexual relationships responded to this designation either by hiding their personal lives or accepting the label of outcast and creating a subculture and identity that developed in Europe and the United States. Along with the penis, gay cock the scrotum is sensitive and considered to be an erogenous zone. A male voyeur is commonly labeled Peeping Tom, a term which originates from the Lady Godiva legend. Bisexual pornography is a genre of pornography which most typically depicts one woman and two men who all perform sex acts on each other.