During a vacation, my husband and I signed up for a leisurely tour down Georgia’s Chattahoochee River. Dressed in sandals, a sundress, and a wide brimmed hat, I groaned when we discovered—contrary to the advertisement—that the trip included light rapids. Thankfully, we rode with a couple experienced in whitewater rafting. They taught my husband the basics of paddling and promised to navigate us safely to our destination. Grateful for my life jacket, I screamed and gripped the plastic handle on the raft until we reached the muddy bank downriver. I stepped onto the shore and dumped water from my purse…