Sadomasochism is practiced in isolation relatively rarely, though some masochists report biting, pinching, or even stun-gunning themselves as lesbian milfs a prelude to, or as part of, masturbation. Throughout history, women have not had the same freedom or independence to pursue homosexual relationships as men, but neither have they met the same harsh punishment as homosexual men in some societies. On the other hand, the masochist enjoys being hurt, humiliated, or suffering within the consensual scenario. Voyeur pornography may also include shots of topless women on topless beaches who are unaware of the cameras but may legally be photographed due to the public setting. In the 18th and 19th centuries, some European theologians and physicians described gay hentai it as heinous, deplorable, and hideous, but videos gays during the 20th century, these taboos generally declined. Yaoi is anime or manga that features gay males . There has been an increase in discussion and portrayal of masturbation in art, popular music, television, films, and literature. Some women who engage in same-sex sexual activity may reject not only identifying as lesbians but as bisexual as well, while other women self-identification as lesbian may not align with their sexual orientation or sexual behavior; sexual identity is not necessarily the same as one sexual orientation or sexual behavior, due to various reasons, such as the fear of identifying their sexual orientation in a homophobic setting. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. Both sexes sometimes apply lubricating substances to intensify sensation. It has also been recommended as a form of foreplay or safer sex. Common positions include lying on back or face down, sitting, squatting, kneeling or standing.