Hugo Ohira, director of marketing for Silvercash, rhetorically asks Who does not like spewing their load on a pretty young face? Although pornography has usually focused on heterosexuality, due to the prevalence of the heterosexual orientation, explicit gay material has a long history as well, which reaches back to Greek antiquity, if not to prehistory. Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games. Going back at hentai porn least as far as the Christy twins in the 1970s, depictions of incest and particularly incest between twins has been a feature of gay pornography. This is commonly called double anal or double stuffing. Shemale is a term primarily used in sex work to describe a trans woman with male genitalia combined with female secondary sex characteristics, usually including augmented female breasts, from breast augmentation and/or use of hormones. One or more of the participants may engage in autoerotic sexual activity, such as masturbation, possibly without physical contact with the other participants. The buttocks in human females thus contain more adipose tissue than in males, especially after puberty. It may be regarded as taboo or unnatural, and is a criminal offense in some countries, punishable by corporal or capital punishment; by contrast, people also regard anal sex as a natural porn milf and valid form of sexual activity that may be as equally fulfilling as any other desired sexual expression. It is mutual consent that makes a clear legal and ethical distinction between BDSM and such crimes as sexual gay cock assault or domestic violence. In some societies, the terms fox, plum, chick, or chicken are preferred. First found in softcore movies and erotic thrillers, depictions of lesbianism entered mainstream cinema in the 1980s. Some actors who are actually gay or bisexual will be marketed as straight to appeal to the allure of the unattainable, because straight men are virgins to sex with other men, and as in most gay male settings, the young, the muscular, and the unfamiliar are more sought..