Softcore pornography generally contains nudity or partial nudity in sexually suggestive situations, but without explicit sexual activity, sexual penetration or extreme fetishism, while hardcore pornography may contain graphic sexual activity and visible penetration, including unsimulated sex scenes. 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 momsex 1959 by the pioneering fetish photographer John Willie, and ENEG Exotique magazine, published 1956-1959. Individuals who can change between top/dominant and bottom/submissive roles—whether from relationship to relationship or within a given relationship—are known as switches, though the term switch in this context is occasionally seen as derogatory and is rejected by many who might simplistically fit the definition. Gonzo porn is influenced by amateur pornography, and it tends to use far fewer full-body/wide shots in favor of more close-ups . For other scenes, particularly in established relationships, a safeword may be agreed to signify a warning rather than explicit withdrawal of consent; and a few choose not to use a safeword at all. Common phrases used to refer to these individuals are chicks with dicks, trannies, or shemales, although these are generally considered pejorative slurs among transwomen. When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. Some productions are noted for sophisticated and/or experimental storytelling and animation techniques. In the 1970s, the hardcore pornography genre introduced the stereotypical cumshot scene as hentai videos a central element of the hardcore film, in which the male actor ejaculates in a way ensuring maximum visibility of the act itself. Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, mutilation, urine, enemas, or feces. The exact source and nature of the fluid continue to be a topic of debate among medical professionals, gay twinks which is also related to doubts over the existence of the G-Spot.