The fundamental principles for the exercise of BDSM require that it should be performed with the informed consent of all involved parties. Simultaneous penetration of the vagina by two penises or other objects. Spanking or whipping pornography involves spanking or whipping, generally of the buttocks, with the hand or with other objects such as belts, switches, paddles, brushes, or whips. The term also refers to the visible seeping or dripping of semen from the vagina . They are often made out of precious woods, with leather used for the seat. It generally contains nudity or partial nudity in sexually suggestive situations. This type of stimulation is typically all that is required to achieve orgasm and ejaculation. Ethnic pornography is a genre of pornography that features performers of specific ethnic momsex groups, or depictions of interracial sexual activity. The films were financially successful, winning AVN Awards for the best selling pornographic films of their year; however the events were effectively un-officiated and the record breaking claims often misleading. Bondage is usually, but not always, a sexual practice. Asian people or Asiatic people are people who descend from a portion of Asia population. For their consent, they must have relevant information at hand and the necessary mental capacity to judge. Instead, lesbian relationships have often been regarded as harmless and incomparable to heterosexual ones unless the participants attempted to assert privileges traditionally enjoyed by men. In recent years, Japanese films of this genre have become more common in the USA and Europe although it still remains a small, fetish-oriented hentai videos part of the adult film industry. When questioned about her particular kink Covét replied, If we women have to take it from behind, then why not a man? Rape itself is a crime in many countries. Human urinal: An act common in the bondage sex community where a male or female slave will serve as a urinal for a dominant partner. Buck Angel is the best-known actor hot gay sex in this genre.