When do you realize you're not "straight"?

So when I broke the news to my wife that I was gay she wondered how long I knew. Why had I entered into a marriage when I was gay?
I thought about that question a lot. Had I known I was gay when I got married? Had I known when I proposed? Had I known when we moved in together? Honestly, I don't think I did know. But here are the clues maybe I should have been more aware of...

I remember being young and thinking boys were cute. I remember my sister being in love with one of the guys off of Dukes of Hazard and me saying I like the other. I remember being attracted to his handsome face, his dark hair and strangely his adam's apple. I wouldn't have even been five years old... should I have known then?

Or what about the times when I would catch myself watching other boys or men where ever I was and beating myself up about it. For some reason thinking it was wrong to watch males and not females. Should I have known then?

Or what about being bullied throughout grade school with people calling me names, asking me if I was a girl. Should I have known then?

And then I got to adolescense. And I dated girls. Got turned on by them. I masterbated just like every other guy my age. I would sneak into my Dad's porn collection and find all of it arousing. Whether it be guy/girl or girl/girl. It was all a turn on. Then I remember how my fantasies during masterbation would change and I'd be more focused on what guy was fucking the girl, or what his cock looked like, or his body. I didn't want to be gay but something in my head was making me pay attention to males more than females. I would swear to myself that I would only masterbate if I thought about the girl and not the guy. I would pray to God that I could be "normal" and only want to be with a girl.

I guess looking back it should be quite obvious that I would probably end up being a gay man. But I guess society got the better of me and I was ashamed of the reality in my head that didn't match what I thought was going to be accepted.

In answer to the question... NO. I did not know I was a gay man. I did not foresee that I would ever get divorced. I had not entered into the relationship in order to maintain a "straight" image. I entered into the marriage because I loved my wife and marriage was the next logical step.