Cartoon pornography depicts mature milfs illustrated or animated fictional characters in erotic and sexual situations. Works in this genre may explore philosophical, political or social issues. Reading or viewing pornography, sexual fantasy or other erotic stimuli may lead to a desire for sexual release such as by masturbation. The current public acceptance of celebrities with sex tapes is speculated by Joe Levy, executive editor of Rolling Stone, to be due to the easy availability of pornography, as well as couples more commonly making their own tapes due to the prevalence of video cameras. The Girls Gone Wild series is one example. Breast fetishism is a paraphilic sexual interest focused on female breasts . The warm sensation felt when urine trickles on the body seems to give very relaxing and pleasurable feelings to the person. Buttocks are sometimes emphasized in pornography, where they are often referred to as booty. In humans, females generally have more round and voluptuous buttocks, caused by estrogen that encourages the body to store fat in the buttocks, hips, and thighs. The neologism pegging was popularized when it became the winning entry in a contest in Dan Savage Savage Love sex advice column, held after an observation was made that there was no common name for the act. Boots are seen as the perhaps most fetishistic hentai videos of all footwear and boots may be the most popular fetish clothing attire. The videos porno gay precise definition of roles and self-identification is a common subject of debate, reflection, and discussion within the community. Some are aroused from wetting their diapers, others like messing their diapers. Erotic spankings are commonly combined with other forms of sexual foreplay. In general, as compared to conventional relationships, BDSM participants go to great lengths to negotiate the important aspects of their relationships in advance, and to take great care in learning about and following safe practices. Top and dominant are widely recognized for those partner in the relationship or activity who are, respectively, the physically active or controlling participants.