In recent years, however, many celebrities have benefited from the publicity resulting from the release of a sex tape. 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. These styles are much closer to the style of bondage scenes in mainstream television. Detective magazines, comic books and early fetish magazines In the early 20th century, Detective magazines covertly provided a way of publishing bondage imagery. Works in this genre may be considered adult for any number of reasons. Some people get sexual pleasure by inserting objects, such as urethral sounds, into the urethra , a practice known as urethral play or sounding. Although there may be no connection between coprophilia and sadomasochism , the limited data on the former comes from studies of the latter. Women with women Main article: Lesbianism in erotica: Lesbianism in contemporary pornography Lesbian or girl-girl pornography features women engaged in sex together, but is typically aimed at a male audience. Sadomasochism hentai movies refers to the aspects of BDSM surrounding the exchange of physical or emotional pain. Women who perform in lesbian pornography often do not consider themselves lesbian or bisexual. Exhibitionism: Becoming noticeably desperate or wetting oneself with the express purpose of being seen by strangers. Commenting on why there gay bear porn 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. Examples of mentally oriented practices are education games, during which the dominant mature milfs requires certain forms of behavior from the submissive.