Clothes optional.

He wanted to throw rocks in the river. I thought it would be a nice way to cool down on a hot August afternoon. He decided a diaper would only hold him back. We spent the afternoon laughing, because you see, he's a no nonsense, no nudity kind of guy. Once, upon seeing his mom in a bikini he said,"You nakie mommy. You nakie. Put clothes on now." We'll speak of the day he flashed all the fish in the New River for years to come.
One day his girlfriend will appreciate these pictures.