Because you have to change them.
One. But he wishes it took two.
Twelve. Three to Physically Change the Bulb, Three to Talk About How Complicated it Was and Six to Call themselves Electricians.
Are you 0K
Because cot(0) doesn't exist... This joke... it burns my eyes...
Incontinent
Both should be changed regularly, and both for the same reason.
Littering.
A $20 bill