This gaysex can, however, redirect semen into the bladder . The term sadomasochism is derived from the words sadism and masochism . Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses . Bondage pornography specializes in the depiction of sexual bondage or BDSM activities as photographs, stories, movies, or drawings. 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. 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 . Tentacle erotica can be consensual, but frequently contains elements of non-consensual sex. Its primary goal is sexual arousal in its audience. If dramatic skills are not involved, a performer in a porn film may also be called a model. Examples of mentally oriented practices are education games, during which the dominant requires certain forms of behavior from the submissive. Celebrity sex tapes are amateur or professionally-made recordings of sex acts, naked milf as performed by a celebrity and their partner. The name is a reference to gonzo journalism, in which the reporter is lesbian hentai part of the event taking place. Since mammary intercourse is a non-penetrative sex act, the risk of passing a sexually transmitted infection that requires direct contact between the mucous membranes and pre-ejaculate or semen is greatly reduced. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. The most common type of erotic spanking is administered on the bare buttocks, but can also be combined with bondage, in order to heighten sexual arousal and feelings of helplessness.