Two penguins are sitting in a rowboat in the middle of the desert

The first says, "Wears the oars."
The other says, "Sure does!"

*(Note: this joke works best when read out loud to someone who doesn't know it.)*

Explanation: About half of the people who hear this joke hear it as "Where's the oars?" which is why it is best when heard rather than read. The point is that the rowboat is in the middle of the desert, so trying to use oars will only result in wearing them down, hence, it "wears the oars."