Sex experts have praised various techniques that the performer can use during fellatio to increase their partner pleasure. Now facial cumshots are regularly portrayed in pornographic films, videos, magazines and internet web sites. 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. While bondage is a very popular variation within the larger field of BDSM, it is nevertheless sometimes differentiated from the rest of this field. This technique may include the use of a simulacrum, or artificial vagina. Real jail or prison or police station shots or videos may violate laws in some countries. Actual upskirt or downblouse shots may violate privacy laws in some countries. One or more of the participants may engage in autoerotic sexual activity, gay fuck such as masturbation, possibly without physical contact with the other participants. It is commonly depicted in pornography, but very rarely in mainstream cinema. Strictly speaking, bondage means binding the partner by tying their appendages together; for example, by the use of handcuffs or by lashing their arms milf fuck to an object. The consent and compliance for a sadomasochistic situation can be granted only by people who can judge the potential results. Celebrity sex tapes are amateur or professionally-made recordings of sex acts, as performed by a celebrity and their partner. Crying pornography that features participating actors crying. Bisexual pornography is a genre of pornography which most typically depicts one woman and two men who all perform sex acts on each other. Mammary intercourse is said by Alex Comfort to produce mutual orgasm in women with sensitive breasts , and it was one of the nine substitute exercises for penetrative sexual activities, as detailed in the Paradis Charnels of 1903. Bobbi hentai videos S. Related genres include: Amateur pornography originally referred only to pornography produced by amateurs but now also includes professionally made pornography designed to appear as if it were amateur.