The Silent Duck, also called Duck-Billing, is the technique often used in which the person engaging in hand insertion shapes the hand to resemble a duck beak. The term soft crush refers to the more common fetish surrounding videos involving inanimate objects or small invertebrates being crushed, while the term hard crush refers to such videos involving larger animals with vertabrae, and arguably more pain-susceptible animals . A pornographic work hentai videos is characterized as hardcore if it has any hardcore content, no matter how small. The term applies to the depiction of the act rather than the act itself, and so does not include live exhibitions like sex shows and striptease. Hardcore pornography is pornography that depicts penetration or extreme fetish acts, or both. Omorashi: The act of holding one own urine until the need to urinate is urgent, making another hold in their urine, or watching another person with an urgent need to urinate. It is used, for example, at fertility clinics to stimulate sperm donors. 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. Shibari is a Japanese word that literally means to tie or to bind. Sometimes one or more fingers may be inserted into the vagina to stroke its frontal wall where the G-spot gay fuck may be located. For instance, Amateur Allure has a trademark shot where the sexually performing cameraman circles a handycam naked milf around the sexually performing model head. Many fantasies include the macrophile shrinking before a normal sized woman or keeping his or her normal height while the partner grows in size. Bisexual pornography is a genre of pornography which most typically depicts one woman and two men who all perform sex acts on each other. Entacle erotica describes a type of pornography most commonly found in Japan which integrates traditional pornography with elements of bestiality and a fantasy, horror, or science-fiction theme.