In celebrity news Japanese, the term describes any type of perverse or bizarre sexual desire or act; it does not represent a genre of work. 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. The naked appearance of actress Demi Moore in the advanced stage of pregnancy on the cover of Vanity Fair magazine in 1991 marked the beginning of a period which has since seen pregnancy presented by celebrities as a glamorous state of living, while also creating a market for photographers to produce images of pregnant mothers, and for fashion stylists to introduce pregnancy styling to their business. Lesbian pornography typically features a wider range of appearances and body types than is typical of mainstream pornography. Positions can also be chosen specifically for added effects such as increased humiliation, elevation and suspension. Cartoon pornography is the portrayal of illustrated or animated fictional characters in erotic or sexual situations. In a few relationships, it leads as far as total submission of one partner in the truest sense of the phrase total power exchange . Some people get sexual pleasure by inserting objects, such as urethral sounds, into the urethra , a practice known as urethral play or sounding. Crush pornography features objects being crushed by an actress or actor, who generally plays an overtly nude milfs dominant role. In POV porn, the shooting style is gay bareback sex generally similar to gonzo pornography, with the person receiving sexual gratification holding the camera him or herself—aiming it lesbian hentai down at the actress or actor who is performing the sex act. The preference could be barefoot, high-heels, flip flops, and so on, depending on the fetishist. As well as traditional attraction, the topic also incorporates mobile teen porn feederism and gaining, where sexual gratification is obtained via the process of gaining body fat. Some intend young gay porn to create situations where others can naked celebrities see their wet clothing.