YESTERDAY, WE WERE AT THE beach near San Diego. The sky was clear, the sand was hot, and the waves were big. My sister, Erica, sister-in-law, Traci, and niece, Aly, were with me, staked out on a blanket. A myriad of teenage cousins were going boogie boarding. My brother-in-law, Brett, an avid surfer, warned the kids about the riptides. He instructed them not to go out above their waists, in case they lost their boogie boards in the waves and needed to swim to shore. They headed out into the surf with shouts of joy.
But while the kids had fun careening through the surf, the blanket brigade spent the afternoon doing head counts. We were making sure no one was getting pulled under. We weren’t the only ones being…