Because all his uncles were "ants"!
or
What? You can change light bulbs?
or
50. One to screw in the light bulb and the remaining 49 to guard him .
or
He was catching all the chickens!
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Five. Four to decide which way the bulb ought to turn, and . . .
or
It takes two. One to change the bulb, and the other to kick the switch.
or
Silly, WASPs don't screw in a light bulb, they screw in a hot tub.
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A nectarine!
or
A gummy bear
or