Internal ejaculation shots are a comparatively recent development in pornography; they are not found in early pornographic films. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. Sub-genres can also be classified into the characteristics of the performers or the type of sexual activity on which it concentrates, and not necessarily on the market to which each sub-genre appeals. Starting with erotic stories and woodblock prints from before the 20th century, Japanese pornography evolved into distinct subcategories with the media that in addition of pornographic videos and magazines featuring live actors, there is exist categories of pornographic manga , pornographic computer games , and pornographic anime . For circumcised males, on whom the glans is mostly or completely uncovered, this technique creates more direct contact between the hand and the glans. Transsexual porn star Wendy Williams nude milfs has stated that transsexual Porn is classified as Straight Specialty. Bestiality is hentai porn illegal in many countries. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. Many fantasies include the macrophile shrinking before a normal sized woman or keeping his or her normal height while the partner grows in size. Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them. The use of the word creampie to describe such scenes originated videos gays in U. Preggo pornography features pregnant performers and may include erotic lactation as a fetish. The other person may do the same during or after. Today, religions vary in their views of masturbation; some view it as a spiritually detrimental practice, some see it as not spiritually detrimental, and others take a situational view.