That gets a reaction. Okay, so he hadn't cared before, but now he's not sure he's alright with this after all. Stanley ducks out of range and puts his hands protectively over his hair.

"What are you doing? Jesus. No!"

It'd sure make his father happy if he went back home with a military cut. So it's got three strikes against it before he's even willing to give it a try. Sure, hair grows back, but he doesn't have any hats to keep his head warm. And girls don't think shaved heads are sexy unless you're a tough guy.