Rough sex pornography is similar to pornography featuring sadomasochism, and typically features a Top who humiliates and/or degrades a Bottom while being physically violent towards them. In addition to mainstream milf fuck pornography, the popularity of facials has led to creation of its own niche market, like video series that specialize in showing the act. Although interracial pornography theoretically can apply to depictions of sexual activity between performers of any different racial groups, the term is most commonly used for heterosexual sex acts between black and white performers. The padding may also muffle noises from the outside, causing a relaxation effect and heightening their other senses. The definition clash also appears with the English definition of yuri as any lesbian relationship, as opposed to its sexually explicit definition in Japan. While bondage is a very popular variation within the larger field of BDSM, it is nevertheless sometimes differentiated from the rest of this field. Facial cum shots are currently regularly portrayed in pornographic films gay cock and videos, often as a way to close a scene. Transsexual pornography features hentai porn transwomen performers, who typically have male genitalia and augmented female breasts . The term hentai is never used in this context in Japanese. There were also a very limited number 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. Sex parties may be organized to enable people to engage in casual sexual activity or for swinging couples or people interested in group sex to meet, but any gathering where sexual activity is anticipated can be called a sex party. For legal reasons, the vast majority of so-called reality porn involves professional actors and actresses posing as so-called amateurs. Another variant of reality pornography consists of normal couples that are filmed by professionals, in which case the only obvious distinction from amateur pornography is the higher quality of production, filming and editing.