I had caught up to a high school kid riding a cruiser with his helmet hanging from the handlebars. So I engaged him in a little Socratic dialogue:

Me: 'Scuse me. Do you mind if I ask you a question? What's with the helmet on the handlebars?

Teen: I dunno.

Me: Well, you made the decision to put it on your handlebars rather than your head, right?

Teen: I guess.

Me: You know that it's to protect your head, right? Are you more worried about protecting your handlebars than your head?

Teen: I dunno.

Me: Let me ask you, are you planning on going to college?

Teen: Umm, I guess. Probably.

Me: Don't you think you'll need your head for college?

Teen: I guess.

(The light changes.) Me: Just some things to think about. Have a good morning and be safe!

Now, in the kid's defense, he was riding VC and--I cannot stress this enough--he had gorgeous hair, thick and perfectly cut and gelled.