Pornographic films or sex films are films that present sexually explicit subject matter for the purpose of sexual arousal and erotic satisfaction of the viewer. The films were financially successful, winning AVN Awards for the best selling pornographic films of their year; mature milfs however the events were effectively un-officiated and the record breaking claims often misleading. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, or attraction to particular stages of pregnancy such as impregnation or childbirth. Bodily functions Menstrual or red rhapsody pornography features sexual activities involving women who are menstruating, with a focus on the menstrual blood. Gang bang pornography is a type of pornography that depicts an individual engaging in physical sexual activity with anime hentai multiple partners sequentially or at once. Anti-pornography psychologist Ana Bridges and colleagues conducted a content analysis of best-selling heterosexual pornographic videos showing that over 96% of all scenes concluded with a male performer ejaculating onto the body of his female partner. Male masturbation may differ between males who have been circumcised and those who have not. Japanese rope bondage is distinguished by videos gays its use of specific katas and aesthetic rules. 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. This is sometimes the case for punishment scenes between master/slave couples or for some extreme or edgeplay scenes which may include abductions, rape play, or interrogation. Consent is the most important criterion here. The surfacing of sex tapes has become so common that some are leaked as a marketing tool to advance or establish a media career. Discipline often incorporates sadomasochistic aspects, though some sadomasochists distance themselves from D/s practices such as punishment.