First Bi Threesome

Occasionally I’ve seen craigslist ads that read something like “bi curious” but what it actually turns out in the fine print is that the poster is actually gay and never had sex with a woman but wants to try it with a couple. Odd or not? I’ve always been bisexual so I don’t know the answer to this one. If anyone wants to chime in with some comments, please do. Isn’t it usually the other way around, where if you’re bi-curious you’d want to try cock vs being gay and wanting to try pussy. Among my gay friends, no one has expressed interest in pussy ever. I think if you start out committed to cock in the beginning, you usually stay gay. Is there such a thing as “straight curious”? Apparently there is, but I’m at a loss to be frank, though it might be something to try since a lot of the gay guys posting are hot as hell.