Pussing: British expression for an activity involving a consenting couple where the male partner watches the woman urinate otherwise undetected in a semi-public place, usually a toilet cubicle at a pub, hotel, restaurant, theatre/cinema, office, club etc. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. In human sexuality, a threesome is sexual activity that involves three people at the same time. Cuckolding can also be mixed with other non-monogamous relationship arrangements with which it has substantial overlap such as Swinging, wife-swapping, open relationships, and polyamory, etc. Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination. The reverse of this, in which nude women interact with clothed men, is called Clothed male, gay boy porn naked female . Both sexes sometimes apply lubricating substances to intensify porn milf sensation. A variant of A2M is ATOM where a performer inserts his penis directly from one 3d hentai recipient anus into a second recipient mouth. For instance, Amateur Allure has a trademark shot where the sexually performing cameraman circles a handycam around the sexually performing model head. Some may keep their hand stationary while pumping into it with pelvic thrusts in order to simulate the motions of sexual intercourse. The wife who enjoys cuckolding her husband is frequently called a hotwife, or a cuckoldress if the man is more submissive. 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. Bondage websites and bondage imagery in mainstream pornography As of 2003, specialist bondage magazines were mostly displaced by the availability of bondage material on the World Wide Web, and the presence of bondage imagery in mainstream pornographic magazines such as Nugget and Hustler Taboo magazine. For example, in Australia it is rated Refused Classification .