Typically featured are hitting, choking, name-calling and hair-pulling. Irrespective of the legal or social view of pornography, it has been used in a number of contexts. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, 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. Rainbow party A rainbow party is an urban legend spread from the early 2000s. Oral sex pornography frequently features a person performing fellatio, and less frequently cunnilingus. The term pearl necklace is used by some because the drops of semen deposited by the man resemble a necklace of translucent white pearls. The Silent Duck, also called Duck-Billing, is the technique often used in which the person engaging in hand insertion shapes the hand to resemble a duck beak. The term sadomasochism is derived from the words sadism and masochism . The smotherbox is placed on a stable surface. Since development and pronunciation of the buttocks begins at menarche and declines with age, full buttocks are also a symbol of youth. However, bisexual pornography is often placed near the gay section in adult video stores, since many consumers are gay men. Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination. Softcore gay pornography also exists; it at one time constituted the genre, and may be produced as beefcake pornography for heterosexual female and homosexual male consumption. When the interest in a particular subject is obsessive, the behavior may be described as stalking. The full-weight body-pressure, moisture, sex odors and darkness can be perceived as powerful sexual attractions or compulsions. Pornographic films are typically categorized as either softcore or hardcore pornography. Types of anal sex can also gay porn be a part of lesbian sexual practices.