On May 27, 2010 the television program The Doctors discussed the topic with dozens of teens, parents, and professionals. 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. Typically featured are hitting, choking, name-calling and hair-pulling. Bear features a combination of middle-aged, hairy or overweight males. For example, in Australia it is rated Refused Classification . Both sexes sometimes apply lubricating substances to intensify sensation. Additionally, the buttocks give an indication of the shape and size of the pelvis, which impacts reproductive capability. The existence of such content in commercially available pornography is widely considered an urban legend. Two women tapegagged and cuffed to iron bars Bondage and Discipline are two aspects of BDSM that do not seem to relate to each other because of the type of activities involved, but they have conceptual similarities, and that is why they appear jointly. Use of the agreed safeword is seen by some as an explicit withdrawal of consent. Examples of mentally oriented gay bear porn practices hentai sex are education games, during which the dominant requires certain forms of behavior from the submissive. For a foot fetishist, points of attraction include the shape and size of the foot and toes , jewelry , treatments , milf xxx state of dress , odor, and sensory interaction . Point of view pornography is adult entertainment filmed to look as if the watcher were experiencing the sex act themselves. 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. Behind the Green Door was one of the first pornographic films to feature sex between a white actress with a black actor . Pro-am pornography is sub-genre of amateur pornography that refers to professionally made porn that features amateur actors/actresses, often appearing for the first time in a pornographic film.