Because they want to.
Just one but he wants to do it thirty-two times and when he's done everyone says that his last light bulb was much better.
Because he wanted a hot rod.
You weren't there man
Because the thief was spending less than his wife.
The shampoo bottle put him in an infinite loop.
Make-bereave
Well, one's a cunning runt...
The good joke doesn't get a black eye when you tell it a second time.