Early last week found me getting a check-up for the first time in more than a decade. With medical professionals in my family, I can too easily put off those preventative appointments. So, I sat in the olive-green vinyl chair, the sort that populate doctors’ offices across the country. I felt a bit sheepish, like I’d been getting away with something by not going to the doctor for so long. The nurse took my vitals. The doctor asked the routine questions. What medications am I on? None. Do I have any allergies? No. Am I sexually active? No. Have I...