1. Helmets

A: Don't ride your bike unless you're wearing a helmet!

B: I don't like helmets. They mess up my hair!

A: It's better to mess up your hair than to mess up your head!

B: I won't fall. I'm a good bike rider.

A: Accidents happen very easily.

B: I've never fallen before!

A: There's a first time for everything.

B: I'll be very careful.

A: If it wasn't so dangerous, there wouldn't be a helmet law.

B: What is the helmetlaw?

A: Children have to wear helmets until they're eighteen.

B: I suppose wearing a helmet won't be too bad, then.