Its nice to be allowed to have doubts about it too, without panicking, even though the final conclusion is that yes I consider myself straight. Its definitly not as binary as SOME people claim. And knowing that, I am also learned to be a lot less trusting of peoples world views and "common sense".
It might be just because I'm relatively middle of the road bisexual, but I always liked the idea that most people aren't quite on the extreme ends of the Kinsey scale, but like, a tiny bit bi at least.
I am definitely thankful for having a family that was very open about everything, and didn't mind either way, though I do feel that the years spent not wanting to engage with the thought partially came down to pressure from peers, as anything other than heterosexuality seemed to be seen as alien back then. From what I hear from my brother, that actually changed a lot compared to when I was in school, and things are a lot more accepting now.
As someone at one of the extreme ends (though it can get complicated at times, male levels of testosterone make me slightly attracted to men) I also find the idea that most people are a little bi to be the case. In fact I didn’t realize I’d been attracted to men at all until I transitioned and that attraction went away.