I’d say that a lot more girls than men are bisexual but not all are. That being said I know a lot of bisexual people but surprisingly I’m the only lesbian that I know.
I think the reason why I know lots of bi females but not men is because I think it’s just more accepted in female friend groups then male ones.
That being said my closest friends are all male and usually when I go out it’s usually just me and a group of 7 guys and I have talked to them before about this and I think we came to the same conclusion. 1 of my male friends have told me they are bisexual but they haven’t said anything to anyone else because of the same reason.