Both sexes sometimes apply lubricating substances to intensify sensation. Testosterone discourages fat storage in these areas. Several hundred exclusively pegging films were produced, 3d hentai as well as twice as many bisexual and straight films with strap-on scenes. Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination. Threesome can also refer to a love triangle, a three-way romantic relationship. Concerted deployed sexual rejection exercised on the partner can be an aspect of Dominance and Submission as well. Bukkake pornography involves a performer, usually female, onto whom several men or women ejaculate, usually on the face. Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses . The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre. Sadomasochism is practiced in isolation relatively porn milf rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation. Bondage/BDSM Bondage pornography features performers tied up or constrained in various ways. The act may be carried out face to face, or head to tail, with the woman recommended to be on top if she has smaller breasts. Foot fetish pornography features heavy emphasis on the feet of the participants, either in combination with kissing and genital sex or in the context of acts such as trampling or crush fetishism. Participants who exert sexual control over their partners are known as dominants or tops while participants who take the passive, receiving, or obedient role are known as submissives or bottoms. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, gay cock focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions.