In some scenes or relationships it may be impossible for consent to be withdrawn in the middle of a scene, or the bottom may have the ability to revoke consent for a relationship as a whole, but not for a particular scene. Simultaneous penetration of the mouth and either the vagina or anus. 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 playspace. Examples include the Girls Gone Wild and Girls Who Like Girls Series. Many cultures describe pain as an aphrodisiac. The term applies to the depiction of the act rather than the act itself, and so does not include live exhibitions like sex shows and striptease. Its primary goal is sexual arousal in its audience. A sex party is a gathering at which sexual activity takes place. Gay-for-pay describes male or female actors, pornographic stars, or sex workers who self-identify as heterosexual but who are paid to act or perform as homosexual professionally. Depictions of male and female masturbation are common in pornography, including gay pornography. Pornography in Japan is large and intertwined business of adult entertainment with unique characteristics that readily distinguish it from western pornography. Pornography in the early 2000s. Transsexual porn star Wendy Williams has stated that transsexual Porn is classified as Straight Specialty. Entacle erotica describes a type of pornography most commonly found in Japan which integrates hentai videos traditional pornography with elements of bestiality and a fantasy, horror, or science-fiction theme. As a result, little in history was documented hot gay sex to give an accurate description of how female homosexuality is expressed. The rise of the Internet in the late 1990s and early 2000s similarly changed lesbian milfs the way pornography film was distributed and furthermore complicated the censorship regimes around the world and the legal prosecution of obscenity. It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena.