Because it goes right out of your head.
Dental floss!
Gladiator.
Dunk your head in a bucket of water and pull it out twice.
You would be too if someone was pulling on your hose all day.
He forgot to cover his tracks! im
I forget
Because it has a head on one side and a tail on the other.
Head & Smolders
To help with the cavity searches
Because they fought both tooth and nail!