The term soft crush refers to the more common fetish surrounding videos involving inanimate objects or small invertebrates being crushed, while the term hard crush refers to such videos involving larger animals with vertabrae, and arguably more pain-susceptible animals . The inside of a smotherbox is often padded to provide support for their neck and prevent their head from moving. 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. The arousal from being desperate comes 3d hentai from the sensation of having a full bladder. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person. As of 2013, little analysis of this paraphilia has been reported in medical literature. The definition clash also gay cock appears with the English definition of yuri as any lesbian relationship, as opposed to its sexually explicit definition in Japan. Incest pornography can feature actual relatives, but the main type of this mature milfs pornography simply uses actors of similar looks to suggest family relationship. It like associating every Christian with the zealots who cause religious wars. Since the 1980s, many practitioners and organizations have adopted the motto safe, sane and consensual, commonly abbreviated as SSC, which means that everything is based on safe activities, that all participants be of sufficiently sound/sane mind to consent, and that all participants do consent. Facial cum shots are currently regularly portrayed in pornographic films and videos, often as a way to close a scene. Sometimes special furniture is used, such as a queening stool or smotherbox. The term discipline describes psychological restraining, with the use of rules and punishment to control overt behavior. First found in softcore movies and erotic thrillers, depictions of lesbianism entered mainstream cinema in the 1980s.