Friendly Hostility's to Blame...
I didn't really realize asexuality was an option in terms of sexuality until I was on wikipedia looking up sexualities and such and stumbled on it. I was pretty pleased, because it clicked and it meant my 5-year-old attitude of "[gender] has cooties!" towards dating and sex wasn't totally unheard of and was allowed. Till then I'd spent the time since I was, maybe, 10 trying to figure out why anyone wanted to have sex, and then thinking there was something wrong for not wanting to go farther than hugs. Which I love, hugs are awesome. Or, were until guys started making lewd comments and girls started calling me gay.
Beautiful world, this... >_<
Though, I gotta admit, I first thought about it when reading Friendly Hostility and Fox said Colin was asexual.