It's not how you pick your nose, it's where you put that booger that counts.
We put boogers on our fingers, then shake your hand.
I have a 10,000-year-old brain and the boogers of a 7-year-old. That's how I describe myself.
Keep your nose to the grindstone. It sharpens your boogers.
I'm scared of boogers. If anyone ever showed me a booger I'd smash their face in.
And they're also very good at math, these super boogers, and so they teach Billy the ways of mathematics.