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. The term combines elements of the Freudian psychoanalytic fetish and the Marxist commodity fetish, and is used in the context of British, Spanish gay cock and French colonialism and imperialism and their aftereffects. For example, in Australia it is rated Refused Classification . Rainbow parties were covered on The Oprah Winfrey Show in 2003, and became the subject of a juvenile novel called Rainbow Party. Additionally, the buttocks give an indication of the shape and size of the pelvis, which impacts reproductive capability. 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. Both sexes sometimes apply lubricating substances to intensify sensation. Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of nude milfs both sexes. Since mammary intercourse is a non-penetrative sex act, the risk of passing a sexually transmitted infection that requires direct contact between the mucous membranes and pre-ejaculate or semen is greatly reduced. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. The most common type of erotic spanking is administered on the bare buttocks, but can also be combined with bondage, in order to heighten sexual arousal and feelings of helplessness. Boots are seen as the perhaps most fetishistic of all footwear and boots may be the most popular fetish clothing attire. In general, BDSM play is usually structured such that it is possible for the consenting partner to withdraw his or her consent during a scene; for example, by using a lesbian hentai safeword that was agreed on in advance. Examples of mentally oriented practices are education games, during which the dominant requires certain forms of behavior from the submissive.