Question about sexuality

im M25

how did you know you were gay or Bi?

I am pondering this quite a lot now , because for quite a few years now I thought I was Bi (or gay, wasn't too sure) but now im in a situation where im free to experiment. I have had a few experiences so far , but to be honest i was not feeling it at all (i was topping always) , I never even came , and im decently sure it is not just nerves or some sort of mental block. its come to a point where i think im not really attracted to men per se, but rather the IDEA of being with men ?(idk how to explain as English is not my first language). I used to be extremely addicted to porn, which may have something to do with it ?

[I do have sex with women and am physically and romantically attracted to them, and experience no such issues]

anyone have a similar experience? how do I even categorise this ?