A lot, because they're fucking stupid.
5 1 to hold the bulb and 4 to spin the ladder.
Who cares
Somebody had an idea.
Two. One to hold the bulb and other to drink until the room spins.
A lot of different reasons.
I don't know, but it sure can wash a lot of dishes.
An untenable situation
Why should you There's a clock on the oven.
Why would a blind man need a light bulb?
Only two, but you've got to wonder how they climbed up there!