Double penetration of the vagina, anus and mouth, can involve: Simultaneous penetration of the anus by two penises or other objects. Women who perform in lesbian pornography often do not consider themselves lesbian or bisexual. 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. Rape pornography features performers simulating rape. Sub-genres can also be classified into the characteristics of the performers or the type of sexual activity on which it concentrates, and not necessarily on the market to which each sub-genre appeals. There are number of types of sex parties: Swinger party/gathering A swinger party or partner-swapping party is a gathering at which individuals or couples in a committed relationship can engage in sexual activities with others as a recreational or social activity. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. The strategies and tactics that are used to smuggle one of the couple into and out of the toilet undetected are as important or almost as important as the urination. Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination. The prostate gland is one of the organs that contributes gay black porn fluid to semen. It is typically animated pornography, as the legal age to be featured in a pornographic film in Japan is 18. Starting with erotic stories and woodblock prints from before the 20th century, Japanese pornography evolved into distinct subcategories with the media that in addition of pornographic videos and magazines featuring live actors, there is exist categories of pornographic manga , pornographic computer games , and pornographic anime . This can, however, redirect semen into the bladder . On May 27, 2010 the television program The Doctors discussed the topic with dozens of teens, parents, and professionals. Films with risqué content commenced to be produced soon after the invention of the motion picture in the 1880s.