Come on, bootjack - you are now going to fulfill your special task and lick my dirty boots clean. Get out your tongue and lick - do you get it? You'll lick my boots only from the bottom, though, only the dirty sole. Don't touch the rest - just the dirty sole and heel. And you'll lick it all - no matter what a dirty mess got stuck down there, you are going to swallow it, all the dirt!