Pornography is often referred to as porn and a pornographic work as a porno. Others involve partners who naturally have a significant difference in size. Generally, interest differs between people, and gender depends on sexual orientation. There is also some evidence that pornography gay hentai can be used to treat voyeurism. Within a BDSM or D/s context, gay boy porn facesitting can be an especially intense form of erotic big tit milf humiliation. Transsexual pornography features transwomen performers, who typically have male genitalia and augmented female breasts . The interaction between tops and bottoms—where physical or mental control of the bottom is surrendered to the top—is sometimes known as power exchange, whether in the context of an encounter or a relationship. Along with the penis, the scrotum is sensitive and considered to be an erogenous zone. Boot fetishism is a sexual fetish dedicated to boots. 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 . Interracial pornography typically employs ethnic and racial stereotypes in its depiction of performers and many of interracial pornographic films still include racial stereotypes, although the segregation of actors by race has diminished considerably. The terms can be complimentary or pejorative. First found in softcore movies and erotic thrillers, depictions of lesbianism entered mainstream cinema in the 1980s. Currently, animated television series aimed at adults are some of the most popular and critically acclaimed forms of entertainment. The stimulation may involve hands, fingers, everyday objects, sex toys or combinations of these. For other diaper fetishists, simply wearing a diaper, the bulking feeling and crinkling sounds associated with it, is enough to cause the fetishist a form of erotic pleasure or sexual arousal.