Just one. To threaten suicide if you don't change it for him/her.
I don't know, Vigo and see. (best read in Yanosh's voice)
It takes four. One to screw in the bulb, and three others to watch and say, "Really dude, you look huge!"
It was too bright in here anyway.
A: I would be forced to drive unlawfully.
A: Only one but it may take him/her more than five years to do it.