Diaper fetishism is totally independent from pedophilia as the wearer derives pleasure only from the diaper and/or use of it. Shotacon : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12. For some people, non-penetrative sex is the primary sexual activity of choice above all others. In the 18th and 19th centuries, some European theologians and physicians described it as heinous, hentai movies deplorable, and hideous, but during celebrity porn the 20th century, these taboos generally declined. Internal ejaculation shots are a comparatively recent development in pornography; they are not found in early pornographic films. Lesbian pornography typically features a wider range of appearances and body types than is typical of mainstream pornography. Many fantasies include the macrophile shrinking before a normal sized woman or keeping his or her normal height while the partner grows in size. Such ejaculation can be done by mammary intercourse, or masturbation over the other person, or result from the withdrawal of the penis from a partner mouth as he is ejaculating following fellatio, irrumatio, or intercourse. Types of anal sex can also be a part of lesbian sexual practices. Pornography may fall into gay fuck more than one genre. Some pornographic films use an artificial semen substitute to simulate or enhance creampie shots. Internationally, hentai is a catch-all term to describe a genre of anime and manga pornography. The current public acceptance of celebrities with sex tapes is speculated by Joe Levy, executive editor of Rolling Stone, to be due to the easy availability of pornography, as well as couples more commonly making their own tapes due to the prevalence of video cameras. Mammary intercourse is known as titty-fucking, titfuck, or a titjob in the United States, as well as nude milfs tit wank or French fuck in hot gay sex the United Kingdom - the latter term dating back to the 1930s; while a more jocular equivalent is a trip down mammary lane. Common positions include lying on back or face down, sitting, squatting, kneeling or standing.