It is commonly depicted in pornography, but very rarely in mainstream cinema. Simultaneous penetration of the mouth and either the vagina or anus. Masturbation has been depicted in art since prehistoric times and is mentioned and discussed in very early writings. Homi Bhabha defined the idea of a racial fetish in contrast to the idea of the Freudian sexual fetish which he describes a denial of difference, where the male sees the female as a castrated male, seeing missing parts rather than a different anatomy. Boot fetishism is a sexual fetish dedicated to boots. Saliva pornography hentai porn involves salivation and saliva. This may relate to fetishes such as voyeurism or cuckolding. Some restrict a policy of panties/nipple tape for females and some allow full nudity with explicit sexual interaction allowed. The term soft crush refers to the more common fetish surrounding videos involving inanimate objects or small porn milf invertebrates being crushed, while the term hard crush refers to such videos involving larger animals with vertabrae, and arguably more pain-susceptible animals . English adopts and uses hentai as a genre of pornography by the commercial sale and marketing of explicit works under this label. The speed of the hand motion will vary from person to person, although it is not uncommon for the speed to increase as ejaculation nears and for it to decrease during the ejaculation itself. However, the tradition of bondage magazines continues in the form of art books of bondage photographs, published by mainstream publishers such as Taschen. A variant of this is known as ATOM or ATOGM where the insertive partner removes his penis from one recipient anus and inserts it into a second recipient mouth. There were also a very limited number gay boy porn of specialist fetish magazines which featured images of bondage, such as the famous Bizarre magazine published from 1946 to 1959 by the pioneering fetish photographer John Willie, and ENEG Exotique magazine, published 1956-1959. Internal ejaculations, followed by images of semen dripping from the anus, are sometimes depicted in bareback gay pornography, where they are referred to by the term breeding or the reverse money shot.