I'm going to skip the whole "I was born here blah, blah, blah" routine and get straight to the point. I was sexually abused at the age of three, lost my grandfather at the age of 6 and figured out I wasn't straight at the age of 13. The way I figured out went like this:

It was the end of school and I was talking to my friend after school. For a few weeks I had been getting the urge to kiss her on the lips and I was so confused about these feelings that I acted on them before thinking about the consequences as usual. Turns out that she had a girlfriend that is trans. So, I tried kissing her and missed her lips completely.