Shermy stands looking at the birdhouse that Charlie Brown (who is stooping next to it) has just built. The former says, "That's a nice looking birdhouse, Charlie Brown."
He stoops down and continues, "But what are the steps for?"
Charlie Brown stands up and replies, "How else do you expect them to get up there?!"
Shermy grimaces as Charlie Brown stoops down and concludes, "Of all the stupid questions!..."