Bestiality pornography involves the sexual attraction of humans to animals. Bobbi S. The interaction between tops and bottoms—where physical or mental control of the bottom is surrendered to the top—is sometimes known as power exchange, whether in the context of an encounter or a relationship. Yiff or Yiffy pornography features Furry or anthropomorphic animals in an erotic or sexual context. But starting with The World Biggest Gangbang , starring Annabel Chong, the pornographic industry began producing a series of films ostensibly setting gangbang records for most consecutive sex acts by one person in a short period. Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . Pegging gay porn is a recently invented word which features a woman penetrating a man with a strap-on dildo. However, the tradition of bondage magazines continues in the form of art books of bondage photographs, published by mainstream publishers such as Taschen. Pornography is generally classified as either softcore or hardcore pornography. Though the term anal sex most commonly means penile-anal penetration, sources sometimes use the term anal intercourse to refer exclusively to penile-anal penetration, and anal sex to refer to any form of anal sexual activity, especially between pairings as opposed to anal masturbation. This is why video stores might consider stocking transgendered subject matter in the straight section, as some straight men will have passive or active sex with another man as long as their partner appears to look like a woman to them, to some minor or major degree. When questioned about her particular kink Covét replied, If we women have to take it from behind, then why not a man? The Japanese sex industry uses the term Paizuri . Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. This is also the case in many relationships not considering themselves as sadomasochistic; it is considered to be a part of BDSM if it is practiced purposefully.