On the other hand, the masochist enjoys being hurt, humiliated, or suffering within the consensual scenario. 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 . In general, BDSM play is usually structured such that it is possible for the consenting partner to withdraw his or her consent during a scene; for example, by using a safeword that was agreed on in advance. Examples of mentally oriented practices are education games, during which the dominant requires certain forms of behavior from the submissive. Older names for a pornographic film include stag film, and blue movie. Diaper fetishism, nappy fetishism or diaperism, is a sexual fetish in which a person feels a desire to wear or use diapers. Sexual relations between women have been illustrated as well as narrated, but much of the written material from the early modern period has been destroyed. When the interest in a particular subject hentai sex is obsessive, the behavior may be described as stalking. In the fetish cuckolding subculture, it is most common for the female to take on the sexually dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist. Rainbow party A rainbow party is an urban legend gay sex video spread from the early 2000s. The existence of such content in commercially available pornography is widely considered an urban legend. Snowballing or snowdropping is the human sexual practice lesbian milfs in which one person takes someone else semen into his or her mouth and then passes it to the mouth of the other, usually through kissing. In S/M, the Sadist is usually the Top and the Masochist the Bottom, but these roles are frequently more complicated or jumbled . What seems clear from the historical record is that much of the lesbian material in pornographic texts was intended for a male readership.