I wouldn't worry. He's still very young after all. Also he's very bright. His brains will keep developing brilliant and clear thoughts. No doubt he'll find that there is a difference between appearances and character. (On the other hand: If the girl made herself up like "a complete freak", then of course that's a very loud statement. Why shouldn't he answer to it? Alright: here "manners" come in. Hmmm... a tricky topic altogether.)