When Ben was 13, he walked into his bunk at a Wisconsin summer camp to see his worst fear realized: About half a dozen other boys, his friends and bunkmates, giggling as they rummaged through his suitcase and his pile of pull-up diapers. Each night at camp, Ben would wait for the bunk to fall silent so that he could tiptoe off to the bathroom with a pull-up from his well-hidden stash in case he peed in his sleep.