A toothbrush.
A: Because they research everything.
A cosmetrologist.
He wrote "1 + 0 = 0" and then spent the rest of the lesson trying to rub one out...
Chimney Cricket !
Tape his mouth shut.
His mouth is moving.
WIFE : I clean the toilet.... HUSBAND:How does that help WIFE : I use your toothbrush.
When your toothbrush stops working mid brushing
It depends on how much crack he can produce.
Your Mother.
Brushing your teeth!
Brushing your teeth