Within a BDSM or D/s context, facesitting can be an especially intense form of erotic humiliation. Especially popular in post-World War 2 Japanese culture. In the context of consensual erotic activities, sadism and masochism are not strictly accurate momsex terms; there is a significant difference from the medical or psychological usage of both terms. It is used, for example, at fertility clinics to stimulate sperm gay fuck donors. In modern BDSM vernacular, the queening stool allows open access to the crotch while seated. Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, mutilation, urine, enemas, or feces. Reality Reality pornography refers to real or faked amateur encounters. Klaw ran an international mail-order business out of his store, Movie Star News, selling cheesecake pinups and bondage/spanking photos. As a result, little in history was documented to give an accurate description of how female homosexuality is expressed. Bottom and submissive are widely recognized terms for those partner in the relationship gay hentai or activity who are, respectively, the physically receptive or controlled participants. Group sex is sexual behavior involving more than two participants. Lesbianism has been a theme in erotic art since at least the time of ancient Rome, and many regard depictions of lesbianism to be erotic. Since the 1980s, many practitioners and organizations have adopted the motto safe, sane and consensual, commonly abbreviated as SSC, which means that everything is based on safe activities, that all participants be of sufficiently sound/sane mind to consent, and that all participants do consent. A female dominant in a master/slave relationship is often termed a Mistress, not to be confused with the colloquial usage of mistress as a kept sexual partner without a similarly formalized power relationship. Heterosexual bareback sex, as opposed to sex with condoms, not only poses an increased risk of STIs, but for pregnancy as well. The term Asiaphile is sometimes used to describe the same phenomenon as is yellow fever .