Bondage pornography specializes in the depiction of sexual bondage or BDSM activities as photographs, stories, movies, or drawings. In contrast, a celebrity may take the route of openly releasing the tape and benefit directly from royalties as well as indirectly from the publicity. Rainbow parties were covered on The Oprah Winfrey Show in 2003, and became the subject of a juvenile novel called Rainbow Party. Particular areas and processes of the body that change during pregnancy may also become the focus of psychological investment, but nudity or sexual activity is not always essential, and in some cases actual pregnancy is not necessary to invoke arousal. Commenting on why there are not as many female macrophiles, psychologist Helen Friedman theorized that because women in most societies already view men as dominant and powerful, there no need for them to fantasize about it. Concerted deployed sexual rejection exercised on the partner can be an aspect of Dominance and Submission as well. Buttocks hentai sex are sometimes emphasized in pornography, where they are often referred to as booty. The industry generally refers to such films as adult films, which is part of adult entertainment. Diaper fetishism, nappy fetishism or gay boy porn diaperism, is a sexual fetish in which a person feels a desire to wear or use diapers. Cum shots typically do not appear in girl-girl scenes and orgasm is normally implied by utterances, cinematic lesbian milfs conventions, or body movement. During anal sex, male pleasure can be particularly derived from the prostate, which can lead to an orgasm and ejaculation. It is also followed by dedicated industry publications and trade groups as well as the mainstream press, private organizations , government agencies, and political organizations. 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. In the 18th and 19th centuries, some European theologians and physicians described it as heinous, deplorable, and hideous, but during the 20th century, these taboos generally declined.