Did you also notice they walked everywhere?"

A teenage boy had just passed his driving test and asked his father when they'd be able to have a discussion about using the car. 

His father said he'd make a deal with his son. "You need to bring your grades up from a C to a B-average, study the Bible, and get a haircut. Then we'll talk about the car.'

The boy thought about that for a moment, decided he'd settle for the offer, and they came to an agreement.

After about six weeks, his father said: "Son, you've brought your grades up and I've observed that you have been studying the Bible, but I'm disappointed you haven't cut your hair yet." 

The boy said: "You know, Dad, I've been thinking about that, and I've noticed in my studies of the Bible that Samson had long hair, John the Baptist had long hair, Moses had long hair - and there's even strong evidence that Jesus had long hair!"

The dad nods wisely, then leans over and whispers to his son:

"Did you also notice they walked everywhere?"