However, gay pornography in the modern world is mostly concentrated in the making of home videos , cable broadcast and emerging video on demand and wireless markets, as well as images and movies for viewing on the Internet. Rimjob pornography centers around anilingus. The most common male masturbation technique is simply to hold the penis with a loose fist and then to move the hand up and down the shaft. Cartoon pornography includes, but is not limited to, hentai and parody renditions of famous cartoons and comics. The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a hentai porn leitmotif of the hardcore genre. This makes varying degrees of stimulation an integral part of oral gay bear porn sex for many men. The Girls Gone Wild series is one example. If one person is penetrated by two objects, it is generically called double penetration . In some creampie films, both gay and straight, intercourse and internal ejaculation are followed by performers licking up the semen that has dripped from their bodies. Gay pornography is the representation of sexual activity between males. Diaper fetishism is totally independent from pedophilia as the wearer derives pleasure only from the diaper and/or use of it. Following the introduction of the Motion Picture Association of America film rating system, independent animation big tit milf producers attempted to establish an alternative to mainstream animation. Buttocks are sometimes emphasized in pornography, where they are often referred to as booty. Being forced to wear diapers as a form of humiliation is sometimes a behavior encountered in sexual masochism. The cover can have hinges or be a separate part. Andrews cross or spreader bars. To avoid soreness from this resulting friction, some may prefer to use a personal lubricant, masturbation cream or saliva during masturbation. While wearing diapers, a diaper fetishist generally experiences a comforting feeling. Bondage pornography specializes in the depiction of sexual bondage or BDSM activities as photographs, stories, movies, or drawings.