"The hair shows you're still learning. Got it. How do you move up from learner to knight or master?" Hey, look, there is some sort of snack over there. Maybe they should trade in a little of the good will Luke has earned and get something to eat? If it's not moving, it's fair game.

And if it is moving, well, it's just a more challenging sort of meal.

They grow 'em weird on the Outer Rim.