Nothing, peanuts don't talk.
or
Two. One to take notes while the other screws it into the faucet.
or
There are footprints in the butter.
or
Three:
One to write the light bulb removal program,
one to write the light bulb insertion program, and
one to act as a light bulb administrator to make sure nobody else tries to change the light bulb at the same time.
or
In a hambulance.
or