Because they fought both tooth and nail!
It's quite easy when you think about it. It's the inside of the hands, inside of the feet, the eyes, the teeth, the nails, and the owner.
A full set of teeth.
THE FEET, THE FEET, THE FEET!!!
A: Their match wouldn't light.
A: No stupid an Eye for an Eye!!!!
Get your cap on the dentist is taking us out tonight.
Molar opposites.
All they will do is fight tooth and nail!