The Hairline

This just happened last week:

Girl: Sir, do you have hair problem?
Me: Nope.
Girl: Are you sure, sir? Your hairline seems to be very high.
Me: *Cheeky grin* Oh, that. Well, you see. I have studied in such a high level that my brain grows. Don't you think that my skull should grow in order to fit my big brain?
Girl: *Shy* Oh.. sorry sir
Me: It's okay. *Walking away like a cool dude but laughing sinisterly*