Growing up, I was asexual or at least I had no idea what my sexual orientation was because I wasn't attracted to boys or girls.
I was 20, when by accident I was jokingly asked by my male remate if I wanted to have sex with him. I got mentality excited, but freaked out.
Of course, I just recently learned I'm an intersexual. Which might explain why I might have had trouble figuring things out.
(Just in case your wondering, yes I like boys.)