Lolicon and its contribution to the controversy regarding the regulation of pornography of depicting minors that don’t exist has been a major issue for free speech in and outside of Japan. For a foot fetishist, points of attraction include the shape and size of the foot and toes , jewelry , treatments , state of dress , odor, and sensory interaction . Clothed male, momporn naked female is one-sided female nudity in which one or more females are nude while one or more men are clothed. Solo performances in gay pornography have been described in 1985 as either or both active and/or passive , whereas female solo performances are said to be exclusively passive . Some pornographic films use an artificial semen substitute gay bear porn to simulate or enhance creampie shots. Mammary intercourse is known as titty-fucking, titfuck, or a titjob in the United States, as well as tit wank or French fuck in the United Kingdom - the latter term dating back to the 1930s; while a more jocular equivalent is a trip down mammary lane. To avoid soreness from this resulting friction, some may prefer to use a personal lubricant, masturbation cream or saliva during masturbation. The phrase buttered bun is sometimes used to refer to the owner of the orifice in question. Participants who exert sexual control over their partners are known as dominants or tops while participants who take the passive, receiving, or obedient role are known as submissives or bottoms. While anal sex is commonly associated with male homosexuality, research shows that not all gay males engage in anal sex and that it is not uncommon in heterosexual relationships. In S/M, the Sadist is usually the Top and the Masochist the Bottom, but these roles are frequently more complicated or jumbled . Coprophilia , also called scatophilia or scat , is the paraphilia involving sexual arousal hentai movies and pleasure from feces. Pornography may fall into more than one genre. Rainbow party A rainbow party is an urban legend spread from the early 2000s. Irrespective of the legal or social view of pornography, it has been used in a number of contexts.