Reading or viewing pornography, sexual fantasy or other erotic stimuli may lead to a desire for sexual release such as by masturbation. The warm sensation felt when urine trickles on the body seems to give very relaxing and pleasurable feelings to the person. For some people, non-penetrative sex is the primary sexual activity of choice above all others. Internationally, hentai is a catch-all term to describe a genre of anime and manga pornography. Positions can also be chosen specifically for added effects such as increased humiliation, elevation and suspension. When used as an alternative to penile-vaginal penetration, gay fuck the goal lesbian hentai may be to preserve virginity or to prevent pregnancy. Shotacon : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12. Contrary to the other two types, B/D does not define the Tops and Bottoms itself, and is used to describe the general activities with either partner being the receiver and the giver. A woman can use a secondary vibrator, between the dildo and her genitals, to get pleasure from pegging. New York photographer Irving Klaw also published illustrated adventure/bondage serials by fetish artists Eric Stanton, Gene Bilbrew, Adolfo Ruiz and others. Ass to mouth is a slang term primarily used to describe the withdrawal of a penis momporn from the receptive partner anus followed by the immediate insertion into the receptive partner mouth. Some people get sexual pleasure by inserting objects, such as urethral sounds, into the urethra , a practice known as urethral play or sounding. The term BDSM dates back to 1969; however, the origin of the term BDSM is unclear and is believed to have been formed either from joining the term B&D with S&M , or as a compound initialism from B&D, D&S , and S&M. Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses . Such works have also often been subject to censorship and other legal restraints to publication, display or possession.