If one person is penetrated by two objects, it is generically called double penetration . Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. 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. As a form of non-penetrative sex, it can be done for its own enjoyment or as foreplay. Studies have found that masturbation is frequent momsex in humans of both sexes and all ages, although there is variation. Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses . Rimjob pornography centers around anilingus. Some people masturbate by using machines videos porno gay that simulate intercourse. 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. Perhaps following the example set by gay pornography, they have become a popular subgenre within heterosexual pornography since the turn of the century, featuring both vaginal and anal ejaculations. Coprophilia , also called scatophilia or scat , is the paraphilia involving sexual arousal and pleasure from feces. Particular areas and processes of the body that change during pregnancy may also become the focus of psychological investment, but nudity or sexual activity is not always essential, and in some cases actual pregnancy is not necessary to invoke arousal. Biological anthropologist Helen B. They may regard it as an enhancing element of their sex lives or as their primary form of sexual activity. The genre presents itself as real couples having hentai sex real sex. The terms Big Beautiful Women and BBW were coined by Carole Shaw in 1979, when she launched BBW Magazine, a fashion and lifestyle magazine for plus-size women Fat fetishism is the strong or exclusive sexual attraction to overweight or obese people.