A police officer sees a man driving around with a pickup truck full of
penguins. He pulls the guy over and says, "You can't drive around with
penguins in this town! Take them to the zoo immediately." The guy agrees
to do so and drives away.
The next day, the officer sees the guy still driving around with the
truck full of penguins -- and they're all wearing sunglasses! He pulls
the guy over and says, "I thought I told you to take these penguins to
the zoo yesterday!"
The guy replies, "I did - they loved it, thanks. Today I'm taking them
to the beach!"