Nuts & bolts!
Well I can clearly see your nuts
Plant its nuts.
The Circuits! (this is a joke i made up when i was like 10, i don't think it ever caught on)
He was missing his winter gear
When they find the position, they can't find the momentum. When they find the momentum, they can't find the position.
They're shellfish in bed.
They don't really know - but they're NUTS about him!