Bear features a combination of middle-aged, hairy or horny milfs overweight males. Women who perform in lesbian pornography often do not consider themselves lesbian or bisexual. Several hundred exclusively pegging films were produced, as well as twice as many bisexual and straight films with strap-on scenes. 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. 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. A related term used in the genre is the term cougar, which implies an older woman as predator. Bukkake pornography involves a performer, usually female, onto whom several men or women ejaculate, usually on the face. In the fetish cuckolding subculture, it is most common for the female to take on the sexually dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist. Pornography may fall into more than one genre. When used 3d hentai as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. Internal ejaculation shots are a comparatively recent development in pornography; they are not found in early pornographic films. 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 gay twink porn to fantasize about it. Bestiality is illegal in many countries. Hardcore pornography is pornography that depicts penetration or extreme fetish acts, or both. Some men also enjoy anal stimulation, with fingers or otherwise, without any prostate stimulation.