The other person may do the same during or after. Some may keep their hand stationary while pumping into it with pelvic thrusts in order to simulate the motions of sexual intercourse. 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. The most common male masturbation technique is simply to hold the penis with a loose fist and then to move the hand up and down the shaft. Sadomasochism is practiced in isolation relatively rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation. Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them. Sexual orientation Pornography features an increasing variety of combinations of actors by their sexual gay movies orientation such as lesbian, gay, bisexual, and transsexuals in addition to traditional heterosexual roles. There has been an increase in discussion and portrayal of masturbation in art, popular music, television, films, and literature. Tentacle erotica hentai sex can be consensual, but frequently contains elements of non-consensual sex. Double Stuffed , Double Vaginal , or Double Anal pornography involves the penetration of one orifice by two penises or other objects. In Canada, Teletoon offers up its own Teletoon at mature milfs Night programming block. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. Common positions include lying on back or face down, sitting, squatting, kneeling or standing. The name was coined from the title of the controversial book. A woman can use a secondary vibrator, between the dildo and her genitals, to get pleasure from pegging. Among swinging couples, one of the two partners is often the driving force and the other is more passive-supportive of the addition of additional sex parties.