J's (multi-part) joke:

Q: Why do elephants wear sandals?
A: So they don't sink into the sand when they go to the beach.

Q: Why do ducks have flat feet?
A: To stamp out forest fires.

Q: What's the difference between an elephant and a plum?
A: A plum is purple!

Q: Why do elephants have flat feet?
A: To stamp out flaming ducks.

Q: Why do ostriches bury their heads in the sand?
A: To look for elephants who didn't wear sandals.