The existence of such content in commercially available pornography is widely considered an urban legend. This stop and go build-up, known as edging, can achieve even stronger orgasms. The object or situation of interest is called the fetish; the person who has a fetish for that object/situation is a fetishist. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. Interactive pornography, available in CD-ROM and DVD format, allows the viewer to select the particular acts performed at any one time, sometimes with the camera providing a first person view. The original definition of dogging – and which is lesbian milfs still a closely related activity – is spying on couples having sex in a car or other public place. Use of the agreed safeword is seen by some as an explicit withdrawal of consent. The term sadomasochism is derived from the words sadism and masochism . Transsexual porn star Wendy Williams has stated that transsexual Porn is classified as Straight Specialty. Pornography may fall into more than one genre. It is used, for example, at fertility clinics to stimulate sperm donors. The term pearl necklace is used by some because the drops of semen deposited by the man resemble a necklace of translucent white pearls. Typically featured are hitting, choking, name-calling and hair-pulling. Clothes wetting: The person is sexually aroused by wetting one clothing or observing another person doing so. The inside of a smotherbox is often padded to provide support for their neck and prevent their head hentai porn from moving. While anal sex is commonly associated with male homosexuality, research shows that not gay bear porn all gay males engage in anal sex and that it is not uncommon in heterosexual relationships. They further argue that setting a discrete line between safe and not-safe activities ideologically denies consenting adults the right to evaluate risks vs rewards for themselves; that some adults will be drawn to certain activities regardless of the risk; and that BDSM play—particularly higher-risk play or edgeplay—should be treated with the same regard as extreme sports, with both respect and the demand that practitioners educate themselves and practice the higher-risk activities to decrease risk.