Pornographic films are typically categorized as either softcore or hardcore pornography. Detective magazines, comic books and early fetish magazines In the early 20th century, Detective magazines covertly provided a way of publishing bondage imagery. Bondage/BDSM Bondage pornography features performers tied up or constrained in various ways. Pro-am pornography is sub-genre of amateur pornography that refers to professionally made porn that features amateur actors/actresses, often appearing for the first time in a pornographic film. The name is a reference to gonzo journalism, in which the reporter is part of the event taking place. 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. This type of pornography is almost exclusively hentai, as true hermaphroditic humans are not fertile and are not usually found in nature. Irrespective of the legal or social view of pornography, it has been used in a number of contexts. The term sadomasochism is derived from the words sadism and masochism . What seems clear from the historical record mature milfs is that much of the lesbian material in pornographic texts was intended for a male readership. The niche popularity grew gay hentai significantly in gay cock the latter half of the first decade of the 2000s. Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result. Buttocks are sometimes emphasized in pornography, where they are often referred to as booty. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. Its primary goal is sexual arousal in its audience. Commenting on why there are not as many female macrophiles, psychologist Helen Friedman theorized that because women in most societies already view men as dominant and powerful, there no need for them to fantasize about it.