Hmm, perhaps it's just me, but I've always thought that good-looking girls become even hotter if they've got this innocent and cute personality, and I've always wondered why.
I could feel sexually attracted to a girl, but if she turns out to be the shy, silent type, it could turn me crazy.
I mean, it's a very teasing thought: she might come off as a calm, nice little girl and so on, but she's probably got some heavy sexual experience, and those thoughts are killers to me.
Do you understand what I'm babbling about?
For better understanding, try combining Tifa's looks with Aeris' personality.