Some BDSM practitioners prefer a code of behavior that differs from SSC and is described as risk aware consensual kink , indicating a preference for a style in which the individual responsibility of the involved parties is emphasized more strongly, with each participant being responsible for his or her own well-being. This may relate to fetishes such as voyeurism or cuckolding. Caro rejected that as being a necessary conclusion, stating that female fatty gay cock deposits on the hips improve individual fitness of the female, regardless of sexual selection. The term is a slang word that originated in the gay community and comes from the equestrian term bareback, which refers to the practice of riding a horse anime hentai without celebrity porn a saddle. Body parts mature milfs including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. 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. For uncircumcised males, stimulation of the penis in this way comes from the pumping of the foreskin, in which the foreskin is held and slid up and down over the glans, which depending on foreskin length, is completely or partially covered and then uncovered in a rapid motion. A female dominant in a master/slave relationship is often termed a Mistress, hentai tentacle porn not to be confused with the colloquial usage of mistress as a kept sexual partner without a similarly formalized power relationship. Insertion in pornography features women inserting various odd objects into their anus or vaginas. Clothed female, naked male is a genre of erotica featuring one or more nude men and one or more clothed women. Gloryhole pornography features women performing fellatio on unidentified men through a small hole made in a bathroom divider.