They can't, it'd be much too cramped. How would they even get in there in the first place?
A: None. Each lightbulb contains the means of its own revolution.
One. Men can be Feminists, too.
They grab the stack of un-signed adoption papers, stand on top of them, then proceed to change the light bulb.
Two. One to change the bulb and one to sing about how grand the old bulb was.
Ireland: More bars in more places
Their dad built it, and their mom cleans it
Because some relationships don't work out.
Scissor Sisters *ba-dum-tiss*