I don ' t know what else anyone should expect from the woman who started off as Rick Sanchez ' s Twitter girl . <| sep |> nope . no gusta <| sep |> Certified dark matter for certified hypernova <| sep |> The command mount , mounts , not shares . <| sep |> My experience is that two attitudes drive biphobia amongst gays . The first of which is factionalist ' them vs . us ' thinking , where ' them ' is straights andor straight society and ' us ' is gays . That ' s most common amongst people in the gay community . This is where I find selfhating biphobia comes from too . Biphobia in this case is an expression of vitriol against bisexuals as ' traitors ' to the LGBT community . I find that people who have bad experiences with straights and straight society are most likely to get involved in the gay community , but that ' s not exclusively true . Sometimes it ' s just convenient or fun . It also tends to be that people who most struggle to be accepted amongst straight society get most involved in the gay community femme men and masc women . So I would expect gays who have had awful experience from family or peers to be more likely to express this sort of vitriolic biphobia . But there ' s a mitigating factor , which is the gay community . A person would be more likely to express this sort of vitriolic biphobia if they highly accepted and encouraged to be part of the local gay community from a young age , than someone who is rejected by peers and family but doesn ' t have access to an insular gay communityThe second factor leading to biphobia is negative stereotyping . I think the things that lead to this are an exposure to negative stereotypes about bisexuals in popular culture , consciousness and media . Often those stereotypes are reinforced by experiences people have . I think that there are factors to do with ostracism that can lead to reinforcement of those stereotypes . If you ' re ostracized , one highly ineffectual strategy to minimise it is to pretend , and convince yourself , that you ' re bisexual . That reinforces myths about straightnowgaylater . Rejection also means that you ' re more likely to seek acceptance and validation in any form you can get it . That might mean an unsustainable relationship . If it ' s with a bi person , they ' re liable to leave you for a straight relationship . But I don ' t think it ' s the biggest factor . tldr there are factors linking the two things that you highlighted , but the most likely thing is that people are just jackasses .