It may be regarded as taboo or unnatural, and is a criminal offense in some countries, punishable by corporal or capital punishment; by contrast, people also regard anal sex as a natural and valid form of sexual activity that may be as equally fulfilling as any other desired sexual expression. After the prerequisite level of sexual stimulation has been achieved, and ejaculation becomes imminent, the male will position his penis so that the semen discharged will be deposited onto his partner face. There may be more than two participants; both group sex and gang banging can be included. Hugo Ohira, director of marketing for Silvercash, rhetorically asks Who does not like spewing their load on a pretty young face? Sub-genres of Japanese porn Among the various sub-genres of Japanese pornography are the following: Lolicon ロリコン: This genre involves prepubescent and adolescent girls between the aged of 6-12. Some techniques which may work for one individual can be difficult or uncomfortable for another. A variation on this is to place the fingers and thumb on the penis as if playing a flute, and then shuttle them back and forth. Examples include the Girls Gone Wild and Girls Who Like Girls Series. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. Rough sex pornography is similar to pornography featuring sadomasochism, and typically features a Top who humiliates and/or degrades a Bottom while being physically violent towards them. There were also a very limited number of specialist fetish magazines which featured images of bondage, such as the gay sex video famous Bizarre magazine published from 1946 to 1959 3d hentai by the pioneering fetish photographer John Willie, and ENEG Exotique magazine, published 1956-1959. Male masturbation may differ between males who have been circumcised and those who have not. Saliva mature milfs pornography involves salivation and saliva. The term hentai is never used in this context in Japanese.