Because sometimes you can get rid of cancer.
or
When it came time to pay, the skunk didn't have a scent, the deer didn't have a buck so they put the meal on the duck's bill.
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Lunch and dinner.
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A centipede with a wooden leg.
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A scale.
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The man says: "You go up there and tell him off. Go on, I'll hold your monkey for you."
or