Because he wanted sweet dreams.
or
None, because they were copycats
or
Only one. But he'll leave a big puddle of spit on the floor underneath him.
or
Two. One to hold the bulb and the other to rotate the planet.
or
Executive Producers don't screw in a light bulb, they screw in a hot tub.
or
They can make little things count.
or
I said, "Are you two an item?"
or