A related term used in the genre is the term cougar, which implies an older woman as predator. Is also common of the furry genre. In Japan, point of view pornography is referred to as hamedori . Some are aroused from wetting their diapers, others like messing their diapers. Today, pornographic films can be sold or rented on DVD, shown through Internet and special channels and pay-per-view on cable and satellite, and in adult theaters. Particular areas and processes of the body that change during pregnancy may gay fuck also become the focus of psychological investment, but nudity or sexual activity is not always essential, and in some cases actual pregnancy is not necessary to invoke arousal. Mammary intercourse is known as titty-fucking, titfuck, or a titjob in the United States, as well as tit wank or French fuck in the United Kingdom - the latter term dating back to the 1930s; while a more jocular equivalent is a trip down mammary lane. It is also known colloquially as gushing or squirting, although these are considered to be different phenomena in some research publications. The existence of such content in commercially available pornography is widely considered an urban legend. It is also followed by dedicated industry publications and trade groups as well as the mainstream press, private organizations , government agencies, and political organizations. Works in this genre may be considered adult for any number of reasons. Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them. What seems clear from the historical record is that much of the lesbian material in pornographic texts was intended for a male readership. Examples of mentally oriented practices are education games, during which the dominant requires certain forms of behavior from the submissive. In 1988, a sex tape caused significant damage to Rob Lowe career. A pornographic momsex work is characterized as hardcore if it has any hardcore content, no hentai sex matter how small.