While the story is presented, and usually marketed, as a more or less "realistic" story about gay issues, pretty much all the gay characters are presented as feverishly sex-obsessed, having polyamorous relationships with each other and just generally banging each other at every conceivable opportunity. Unfortunately, this trope is played completely straight in Associated Student Bodies, a furry comic about a young lion who discovers his homosexuality while living in a nearly all-gay dorm at college.However, Matsuri is the only one Reo wants to start dating. She also has No Sense of Personal Space toward other girls, readily getting up close to smell them if she likes their scent.
Ayakashi Triangle: Reo is openly bisexual and shows no preference for men or women (contrast with Suzu, who is Ambiguously Bi and definitely favors men).Notably is that she is the only female character shown to be sexually active at all and that the other female leads all prefer Senou in his male form. Later, it turns out that she has a Split Personality which gets off on sexually brainwashing women, to the point that she has her own harem of slaves and is shown in bed (implied to be post-coitus) with them multiple times. Kämpfer: Sakura is a lesbian with a tremendous crush on the main character in his female form.His promiscuous behavior has less to do with him being gay and more to do with his issues over his past abuse. After breaking ties with his crush, he began hanging around older men in drag and tried to have sex with at least two different characters (and actually does with Marika to an extent). Prior to that, he had Erotic Dreams where he was a nymphomaniac woman and he believes these were visions of a past life, though they're really related to his repressed memories of being molested when he was younger. Tamura lost his virginity in middle school to his abusive straight crush. Tamura is the most hormonal of the major characters by far. Murciélago has the protagonist Kuroko whose biggest priority always seems to be getting a pretty lady to sleep with her.In his introductory chapter, the first thing he says to every guy he meets is "Hey, wanna go to a hotel later?". Prince Charming: Mostly Kagami, but Asahina is tempted to invoke this trope.Possibly both of the characters from Kuso Miso Technique but certainly Abe, who sits outside the public toilets, asking good-looking men if they "want to do it" and then shows them his penis.Although this may be less to do with being gay and more to do with him having some serious unresolved issues. One would be hard-pressed to find a Yaoi Genre work that doesn't contain explicit sex.Avoiding both can be a tricky minefield with no obvious solution, which ironically is part of the problem bisexuals often face when dating. However, in real life, even among the LGBT community, bisexuals often face biphobic discrimination for supposedly being promiscuous and unfaithful, as well as accused of being confused/in-denial of their sexuality or even merely wanting attention, so playing this straight and averting it both results in negative implications. Having multiple relationships with multiple genders helps to avoid this. When it comes to bisexual characters, this can be the result of writers wanting to avoid But Not Too Bi by committing to a monogamous relationship, the bisexual character might be deemed 'choosing a side', leading either to the appearance they were merely gay-in-denial, or were merely expressing token same-sex affections for the sake of fanservice/diversity. This is part of the basis behind the Lesbian Vampire trope, who is a woman that preys on other women and "transforms" them into creatures like her.
Lesbians have their own version of this trope lesbians are stereotyped as women stepping in the roles of men, which includes emulating the male sexual appetite. This difference included denigrating marriage and monogamy, thus strengthening the link between homosexuality and promiscuity in the eyes of those who viewed all homosexuals as sick sexual deviants. This trope has some interesting historical basis, in that many gay and lesbian writers post-Stonewall (and a few queer theory writers more recently) advocated emphasizing difference from heterosexual and normative life.