Practitioners have described going to public places such as a mall or a park. Arguably the most famous example of the genre is the Taboo series. The anal and rectal tissues are delicate and do not provide natural lubrication, so they can easily tear and permit disease transmission, especially if lubricant is not used. Yuri is the lesbian equivalent. The release of Paris Hilton sex tape in 2003 as well as Kim Kardashian in 2007 brought them to a new level of fame, leading to magazine covers, book deals and reality TV series. Female-to-male strap-on pornography became a popular sub-genre in the United States in the early 21st century, with a number of studios producing dedicated series about it. Sometimes, asymmetric and often intentionally uncomfortable positions are employed to heighten the psychological impact of the bondage. It explores the more mental aspect of BDSM. A queening stool is a low seat which fits over the submissive face and contains an opening to allow oral-genital and/or oral-anal stimulation of the domme while seated. Teabagging is the act of placing one testicles on another face or in their mouth. As observation is encouraged, voyeurism and exhibitionism lesbian hentai are closely associated with dogging. Erotic black gay spanking is the act of spanking another person for the sexual arousal or gratification of either or both parties. In terms of physical pleasure, a woman genitals may get direct stimulation from the base of the dildo, or in the case of a double-ended dildo, from vaginal penetration. Facesitting is common among dominant and submissive individuals, for demonstrating horny milfs superiority and Porn Stars for sexual gratification. Although macrophilia literally translates to simply a lover of large, gay cock in the context of a gay cock sexual fantasy it is used to mean someone who attracted to beings larger than themselves. Exhibitionist pornography features performers, usually female exposing themselves in public and spans simple flashing to public sex. 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.