I think you are sorely mistaken. Just because someone hasn’t had the opportunity to date or be with a woman doesn’t make them any less bisexual. I mean, if you had never dated a woman does that mean you can’t be straight? That logic is just incorrect. Bi-curious is something entirely different.
That doesn’t surprise me. I’m generally open about this on Ask women but much less on here. I’ve been out as bisexual for 9 years now. I’ve heard it all. That bisexual women are prone to cheating, that we only do it for men’s attention- whatever you say I’ve heard it. And I can assure you that in this case you are incorrect. There’s no more chance of a bisexual woman cheating then of a straight women cheating. More “options” doesn’t equal an unfaithful partner.
Yeah those are all fair and logical points and I’ve actually dated a couple of bisexual women and I’ll admit I’ve had a negative experience with one which has shaped some of my views. It’s an unfair stigma that women like you are up against but I think it’s particularly difficult when dating more sensitive heterosexual men. The only additional devils advocate point would be to ask how you/other women would feel about dating a bisexual man.
I’ve happily dated bisexual men before. You are using your negative experiences to color everything. Which is understandable up to a certain point however you should not invalidate people’s sexuality so easily. I’m glad you at least acknowledge that you are bias but you can’t simply blame it on “sensitivities”