I took my visiting parents swimming at a favorite beach in Florida many years ago, unaware that it had developed into a nude beach since I had last been there. We were clued in when a young man walked up, removed his bathing suit, and proceeded into the water.

Recently I was driving through San Francisco and noticed a guy washing his windows in a second-story apartment. It took a minute to realize he was stark naked. I guess he didn't want to get his clothes wet.