When he first showed me the crescent-shaped rash on his chest, right over his heart, I glanced at it from across the kitchen. My husband was fresh from the mid-summer garden, dripping fresh salty sweat on the floor. I knew better than to come too close, and there was always something. The cactus splinters in his hands, the twig in his eye, his darkened rotting toe. “Feel it!” He didn’t sound too desperate, so I said, “I’m not a doctor.” That afternoon, I scooped cookie dough. My h...