Types of anal sex can also be a part of lesbian sexual practices. The object or situation of interest is called the fetish; the person who has a fetish for that object/situation is a fetishist. Hardcore pornography is pornography that depicts penetration or extreme fetish acts, or both. 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. Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination. Terminology for roles varies widely within the various BDSM subcultures. Lying face down on a comfortable surface such as a mattress or pillow, the penis can be rubbed against it. Rape pornography features performers simulating rape. The lesbian hentai scenario is a genre of erotica, which on the internet is sometimes abbreviated gay cock to CMNF, and may involve sexual and nonsexual erotic scenarios. These scenes may involve the female actor calling for the shot to be directed at some specific part of her body. Even milf fuck though the performers who perform in these films typically appear on many reality websites within a short span of time, most of these websites claim that each of them is an amateur. The strategies and tactics that are used to smuggle one of the couple into and out of the toilet undetected are as important or almost as important as the urination. Gay-for-pay describes male or female actors, pornographic stars, or sex workers who self-identify as heterosexual but who are paid to act or perform as homosexual professionally. Advocates of RACK argue that SSC can hamper discussion of risk because no activity is truly safe, and that discussion of even low-risk possibilities is necessary for truly informed consent. Reality pornography is professionally made porn which seeks to emulate the style of amateur pornography. Often, strong views are expressed with regard to anal sex; it is controversial in various cultures, especially with regard to religion, commonly due to prohibitions against anal sex among gay men or teachings about the procreative purpose of sexual activity.