The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre. 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. These are often fake. These actors often play the top roles but this is not always the case, such as with Kristen Bjorn and some Bel Ami models. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. During anal sex, male pleasure can be lesbian hentai particularly derived from the prostate, which can lead to an orgasm and ejaculation. The industry generally refers to such films as adult films, which is part of adult entertainment. Some aspects of the research community distinguish between female ejaculation and gay twinks what is colloquially known as squirting or gushing. The warm sensation felt when urine trickles on the body seems to give very relaxing and pleasurable feelings to the person. Such works have also often been subject to censorship and other legal restraints to publication, display or possession. A woman can use a secondary vibrator, between the dildo and her genitals, to get pleasure from pegging. Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of both sexes. Unlike the usual power neutral relationships and play styles commonly followed by couples, horny milfs activities and relationships within a BDSM context are often characterized by the participants taking on complementary, but unequal roles; thus, the idea of informed consent of both the partners becomes essential. In general, as compared to conventional relationships, BDSM participants go to great lengths to negotiate the important aspects of their relationships in advance, and to take great care in learning about and following safe practices. Some masturbate only using pressure applied to the clitoris without direct contact, for example by pressing the palm or ball of the hand against underwear or other clothing.