In general, softcore pornography is pornography that does not depict explicit sexual activity, sexual penetration or extreme fetishism. A smotherbox has two openings. It may be regarded as taboo or unnatural, and is a criminal offense in some countries, punishable by corporal or capital milf fuck punishment; by contrast, people also regard anal sex as a natural and valid form of sexual activity that may be as equally fulfilling as any other desired sexual expression. Given the wide range of practices, some of which may be engaged in by people who do not consider themselves as practicing BDSM, inclusion in the BDSM community or subculture is usually dependent on self-identification and shared experience. Fisting involves the insertion of one partner entire hand into a vagina or the anal cavity. Enema pornography involves adults given enemas to others, often fake. Individuals who can change between top/dominant and bottom/submissive roles—whether from relationship to relationship or within a given relationship—are known as switches, though the term switch in this context is occasionally seen as derogatory and is rejected by many who might simplistically fit the definition. Bukkake pornography usually hentai movies depicts numerous men having sex with one woman, with multiple, usually 10 or more, men ejaculating on the female face. Some productions are noted for sophisticated and/or experimental storytelling and animation techniques. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, or attraction to particular stages of pregnancy such as impregnation or childbirth. In many cases, that person is also aroused by smelling body parts that have a urine scent. Not all crush fetishists are that extreme! Other forms of anal sex include fingering, the use of sex toys for anal penetration, oral sex performed on the anus , and pegging. However the genre hot gay sex remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies.