Four. One to change the bulb and three to make a t-shirt about it.
Five. One to handle the bulb and 4 to contemplate how David Sanborn would've done it.
One. They simply hold the bulb and wait for the world to revolve around them.
Just one. But it takes five episodes.
One to change the lightbulb and one to drive down to Kent to pick him/her up.
None. Monkeys screw in trees.
Two: One to change it, and the other one to change it back again.
A Casual Tee.
A dog has a better understanding of no.