Snowballing or snowdropping is the human sexual practice 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. Group sex pornography features at least two men and two women , usually more, who all perform sex acts on each other. Lolita pornography features women who are 18 years old or slightly older, who pretend to be underage teen girls. Barebacking usually refers to a conscious and deliberate choice to forgo condoms. The cover videos gays can have hinges or be a separate part. It has also been recommended as a form of foreplay or safer sex. Threesome can also refer to a love triangle, a three-way romantic relationship. The actual height of the giantess within the fantasy may vary depending on the individual. Some anthropologists and sociobiologists believe that breast fetishism derives from the breasts similarity to buttocks, but instead provide sexual attraction from the front of the body. Pornographic films are typically categorized as either softcore or hardcore pornography. Internal ejaculation shots are a comparatively recent development in 3d hentai pornography; they are not found in early pornographic films. Older names for a pornographic film include stag big tit milf film, and blue movie. 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. Pornography may be presented in a variety of media, including books, magazines, postcards, photographs, sculpture, drawing, painting, animation, sound recording, film, video, and video games. The industry generally refers to such films as adult films, which is part of adult entertainment. Common positions include lying on back or face down, sitting, squatting, kneeling or standing. Hamedori is a genre of Japanese pornography in which a male adult video actor or director serves as the camera operator. In academic discourse, racial fetishism is a postcolonialist term found in the writings of authors such as Homi K.