Today, religions vary in their views of masturbation; some view it as a spiritually detrimental practice, some see it as not spiritually detrimental, and others take a situational view. Hardcore pornography is pornography that depicts penetration or extreme lesbian milfs fetish acts, or both. 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. Spanking can be administered in a number hot gay sex of spanking positions. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. 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 hentai sex - the latter term dating back to the 1930s; while a more jocular equivalent is a trip down mammary lane. The glans itself may widen and lengthen as the stimulation continues, becoming slightly darker in colour, while the gliding action of the foreskin reduces friction. Femdom features BDSM scenes in which the dominant partner is female. Oral sex pornography frequently features a person performing fellatio, and less frequently cunnilingus. Arcane or occult pornography involves sexualized situations with an occult or magical tone or performers who costume themselves in keeping with the theme, for example, a male performer dressed as a wizard. This makes varying degrees of stimulation an integral part of oral sex for many men. Contrary to the other two types, B/D does not define the Tops and Bottoms itself, and is used to describe the general activities with either partner being the receiver and the giver. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear.