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. They signal the presence of estrogen and the presence of sufficient fat stores for pregnancy and lactation. A scene where many women have sex with one man is referred to as a reverse gang-bang. In these research publications, it is suggested that real female ejaculation is the release of a very scanty, thick, gay fuck and whitish fluid from the female prostate, while the squirting or gushing shown frequently in pornography is a different phenomenon, the expulsion of clear and abundant fluid, which has been shown to be a diluted fluid from the urinary bladder. Yuri : Featuring two grown adult women in a lesbian hentai homosexual/lesbian relationship. Works in this genre may be considered adult for any number of reasons. Shotacon : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12. Some are aroused from wetting their diapers, others like messing their diapers. Breast fetishism is a paraphilic sexual interest focused on female breasts . It is the most common form of sexual fetishism for otherwise non-sexual objects or body parts. Mutual masturbation, mutual manual stimulation of the genitals between partners, can be a substitute for sexual penetration. 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. These actors often play the top roles but this is not always the case, such as with Kristen Bjorn and some Bel Ami models. 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. As women, they face concerns separate mature milfs from men. In 1988, a sex tape caused significant damage to Rob Lowe career.
