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. The essence of voyeurism is the observing but may also involve the making of a secret photograph or video of the subject during an intimate activity. With second wave feminism and growth of scholarship in women milf fuck history and sexuality in the 20th century, the definition of lesbian broadened, sparking a debate about sexual desire as the major component to define what a lesbian is. Yiff or Yiffy pornography features Furry or anthropomorphic animals in an erotic or sexual context. Failure to honor a safeword is considered serious misconduct and could even change the sexual consent situation into a crime, depending on the relevant law, since the bottom has explicitly revoked his or her consent to any actions that follow the use of the safeword . Bukkake videos are a relatively hentai movies prevalent niche in contemporary pornographic films. Insertion in pornography features women inserting various odd objects into their anus or vaginas. To tea bag is a slang term for the sexual act of a man placing his scrotum in the mouth of a willing sexual partner for pleasure or onto the face or head of another person. The first gay fuck pegging scene appears to have been in the non-pornographic 1970 film Myra Breckinridge, based on the novel of the same name by Gore Vidal, although it was not explicit. 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 yields a view that would not be obtainable directly through the eyes of a person while experiencing the sex act. Going back at least as far as the Christy twins in the 1970s, depictions of incest and particularly incest between twins has been a feature of gay pornography. Unlike Yaoi, Bara is normally made by actual homosexual men, for homosexual men, and tends to focus on the more realistic obstacles and challenges that come with being homosexual in Japan.