This is Cee Gee with another musing...
Here is the impression on how queer perceptions and biphobia or its impact on it has evolved/devolved.
(Disclaimer: Although I only mention celebs, I have seen this with average joes too)
For men: If they are not cool enough for you for any reason and date lots of women, they are queerbaiting. Why? because if they were cool enough or something else enough, you would accuse them of bearding constantly (EG Harry Styles vs... I don't know if I should pull these names, but Leonardo DiCaprio? Tom Cruise?). I have wondered why most gays refuse to claim Harry Styles when others in his situation have been accused of bearding. I guess he became too much even for gay boards who like to claim every man to be gay (OK, I exaggerate. A little.)
For Women: If they are cool enough and have been dating women for years (Saffron Burrows, Sarah Paulson, and the most famous, Kristen Stewart), or even stick to one woman long term after a lifetime of dating men (Cynthia Nixon*), they were lesbian all along. This, despite of the fact that they have (and some continue) to affirm that their attraction/relationships with men were genuine. And if they end up with men... Well "all bisexual women end up with men eventually."
Trans? Essentially gay men, lost lesbians or they have to be called pansexual.
Non-binary people: "What was your biological sex?" Or the sort.