One tooth
5 years.
A Dollar
So you can floss your teeth with them after you've used them.
They can't bite because all that honey rotted their teeth. (From my 7 year old niece)
To get a tight seal.
A crackhead buys crack so he can put it into his pipe and burn it. A John pays so that he can put his pipe into a crack that might burn him.
Crack-a-lacking