As Joe and his very loquacious father begin to run errands one Saturday, he notices his dad has forgotten to zip his fly.  Joe tries many times in many ways to tell his father, but he cannot get a word in edgewise.  Artist Nancy Carlson includes many clever details as Joe and his father go from place to place: pop fly at the ball field, the car license plate XYZ PDQ, picking up zip ties at the hardware store, even a little house fly that accompanies them on their errands.  Finally, at their last stop in the grocery store, Joe comes up with a creative way to get his father’s attention.  Zippers and flies are certainly the theme of this colorful book.  This could be a good resource on polite ways to talk about embarrassing or awkward subjects.