When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. Detective magazines, comic books and early fetish magazines In the early 20th century, Detective magazines covertly provided a way of publishing bondage imagery. Femdom features 3d hentai BDSM scenes in which the dominant partner is female. Compensating elements of the total dominance and submission are care and devotion complementing one another, thus facilitating stable relationships. Mammary intercourse is known as titty-fucking, titfuck, or a titjob in the United States, as well as tit wank or French fuck in the United Kingdom - the latter term dating back to the 1930s; while a more jocular equivalent is a trip down mammary lane. If one person is penetrated by two objects, it is generically called double penetration . New York photographer Irving Klaw also gay twinks published illustrated adventure/bondage serials by fetish artists Eric Stanton, Gene Bilbrew, Adolfo Ruiz and others. 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. Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result. Its primary goal is sexual arousal in its audience. Rainbow party A rainbow party is an urban legend spread from the early 2000s. Pornography in Japan is large and intertwined big tit milf business of adult entertainment with unique characteristics that readily distinguish it from western pornography. The other person may do the same during or after. It contains graphic sexual activity and visible penetration. The existence of such content in commercially available pornography is widely considered an urban legend. This industry employs thousands of performers along with support and production staff. Double Stuffed , Double Vaginal , or Double Anal pornography involves the penetration of one orifice by two penises or other objects.