Common phrases used to refer to these individuals are chicks with dicks, trannies, or shemales, although these are generally considered pejorative slurs among transwomen. This category also includes pornographic home movies. Real enema shots or videos of true medical situations may violate privacy laws in some countries. Pornography is generally classified as either softcore or hardcore pornography. However, the tradition of bondage magazines continues in the form of art books of bondage photographs, published by mainstream publishers such as Taschen. They cited the Internet and text messaging as common ways of organising meetings. He talked to them extensively on camera so that both he and the viewer can come to know them before any sex scenes. Transsexual porn star Wendy Williams has stated that transsexual porn is classified as Straight Specialty. Some BDSM practitioners prefer a code of behavior that differs from SSC and is described as risk aware consensual kink , indicating a preference for a style in which the individual responsibility of the involved parties is emphasized more strongly, with each participant being responsible for his or her own well-being. 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. There are currently no known laws forbidding the crushing of objects and insects, however the production or trade of crush erotica involving live vertebrates is condemned by animal rights activists and is illegal in many countries, including the United States and Great Britain. Performers young gay porn are usually clean-shaven, thinner and more effeminate than ones in mainstream mature milfs gay pornography. High heel pornography involves women or men dressed hentai porn in high heeled shoes. Te Boobs acher and Student or Boss and Secretary pornography involves sexualized situations which take place between an authority figure, such as a teacher or boss, and an underling, such as a student or secretary, often fake.