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. Sex experts have praised various techniques that the performer can use during fellatio momsex to increase their partner pleasure. These scenes may either have the cameraman directly engaging in sex or merely filming others having sex. Using the term shemale for a transsexual woman often implies that she is working in the sex trade. Often a dominant woman, she may be called a Dom, Domme /ˈdɒm/, Femdomme, Domina, or Dominatrix, depending on context or personal preference. There were also a very limited number of specialist fetish magazines which featured images of bondage, such as the famous Bizarre magazine published from 1946 to 1959 by the pioneering fetish photographer John Willie, and ENEG Exotique magazine, published 1956-1959. Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, mutilation, urine, enemas, or feces. While most tentacle erotica is animated, gay bear porn there are also a few live-action movies. Through the 1990s, mainstream movie and television actors have been more willing to portray homosexuality, as the threat of any backlash against their careers has lessened and society acceptance of gay and lesbian people has increased. Pornographic films are generally classified into sub-genres which describe the sexual fantasy which the film and actors attempt to create. However, the tradition of bondage magazines continues in the form of art books of bondage photographs, published by mainstream publishers such as Taschen. Going back at least as far as the Christy twins in the 1970s, depictions of incest and particularly lesbian hentai incest between twins has been a feature of gay pornography. As of 2010, they were reported to live together as a monogamous couple outside of their porn careers and want to continue working together for another 50 years. Cum-shot pornography features a collection of male ejaculation scenes.