The term has as its origins Frantz Fanon epidermal schema and Edward Said Orientalism. Common phrases used to refer to these individuals are chicks with dicks, trannies, or shemales, although these are generally considered pejorative slurs among transwomen. Partners can engage in penetrative sex, known as full swap, or choose to soft swap in which they engage only in non-penetrative sex. One or more of the participants may engage in autoerotic sexual activity, such as masturbation, possibly without physical porn milf contact with the other participants. Cum swapping pornography involves performers trading semen between their mouths. The nipples are erogenous zones, and vigorous stimulation of them during masturbation usually causes the penis to become erect more quickly than it would otherwise. In many cases, that gay bear porn person is also aroused by smelling body parts that have a urine scent. Softcore pornography generally contains nudity or partial nudity in sexually suggestive situations, but without explicit sexual activity, sexual penetration or extreme fetishism, while hardcore pornography may contain graphic sexual activity and visible penetration, including unsimulated sex scenes. However the genre remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies. Fetish cuckolding can have a wide range of expression, from pillow-talk fantasy anime hentai between monogamous partners to extreme alternative lifestyles, depending on the couple. 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 and valid form of sexual activity that may be as equally fulfilling as any other desired sexual expression. The exact source and nature of the fluid continue to be a topic of debate among medical professionals, which is also related to doubts over the existence of the G-Spot. BDSM has become an umbrella term for certain kinds of erotic behavior between consenting adults.