A female dominant in a master/slave relationship is often termed a Mistress, not to be confused with the colloquial usage of mistress as a kept sexual partner without a similarly formalized power relationship. Sex experts have praised various techniques that the performer can use during fellatio to increase their partner pleasure. Watersports pornography features sexual activities involving urine, such as golden showers. The term is a slang word that originated in the gay community and comes from the equestrian term bareback, which refers to the practice of riding a horse without a saddle. In the context of consensual erotic activities, sadism and masochism are not strictly accurate terms; there is a significant difference from the medical or psychological videos porno gay usage of both terms. Such explicit sexual interaction is seen only rarely in public play spaces, and it is sometimes specifically banned by the rules of a party or horny milfs playspace. The object or situation of interest is called the fetish; the person who has a fetish for that object/situation is a fetishist. A somewhat controversial ejaculation control technique is to put pressure on the perineum, about halfway between the scrotum and the anus, just before ejaculating. The concept of lesbian, to differentiate women with a shared sexual orientation, is a 20th-century construct. Pornography is generally classified as either softcore or hardcore pornography. Transsexual gay hentai porn star Wendy Williams has stated that transsexual porn is classified as Straight Specialty. Most soft crush fetishists avoid being placed under the same label as hard crush fetishists, believing that crush films with larger animals give the entire group a bad label. In addition to mainstream pornography, the popularity of facials has led to creation of its own niche market, like video series that specialize in showing the act. 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.
