None! We don't change light bulbs. We disrupt them.
Find out next time, on Dragonball Z!!!
One, but you can be sure a whole Reddit community will appear to expand the joke, make it funnier and eventually run it into the ground.
Just 1...blondes will screw anything.
A: Three - one to change it, one to not-change it and one to both change-and not-change it.
If they go to college, they'll probably get stoned.