In S/M, the Sadist is usually the Top and the Masochist the Bottom, but these roles are frequently more complicated or jumbled . Sexual orientation Pornography features an increasing variety of combinations of actors by their sexual orientation such as lesbian, gay, bisexual, and transsexuals in addition to traditional heterosexual roles. If one person is penetrated by two objects, it is generically called double penetration . 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. The term combines elements of the Freudian psychoanalytic fetish and the Marxist commodity fetish, and is used in the context of British, Spanish and French colonialism and imperialism and their aftereffects. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. In Japanese, this natural-fibre rope is known as asanawa; the Japanese vocabulary does not make a distinction between hemp and jute. In Japanese, the term describes any type of perverse or bizarre sexual desire or act; it does not represent a genre of work. The act may be carried out face to face, or head to tail, with the woman recommended to be on top if she has smaller breasts. This is commonly called gay cock double vaginal penetration or double stuffing. In Japan, point of view pornography is referred to as hamedori . The cover can have hinges or be a separate part. What seems clear from the historical record is that much of hentai videos the lesbian material in pornographic texts was intended for a male readership. Diaper fetishism, nappy fetishism or diaperism, is a sexual fetish in which a person feels a desire to wear or use diapers. Common phrases used to refer to these individuals are chicks with dicks or the derogatory milf xxx term shemale, although these are generally considered pejorative among transwomen. Clothed female, naked male pornography features naked men and clothed women; typically, the women humiliate and abuse the men or perform fellatio and/or handjobs on the men.