Because he was feeling crumby.
or
Only one, but they get three tech. reports out of it.
or
Shamboo!
Frankenstein: Witch can you make me a lemonade?
Witch: Poof you are a lemonade!
or
he said, "Those are pickled onions".
or
Two — one to screw it most of the way in and the other to give it a surprise twist at the end.
or
50. One to screw in the light bulb and the remaining 49 to guard him .
or
2 years old.
Cow: "Mooooove over"
Sheep: "Naaaaaaa."
or