“I kept taking the willow bark,” she assured me. “Only after a while, I started grinding the leaves up and making pills out of them with cheese, because the tea made me pee all the time, and I couldn’t stop painting every fifteen minutes to go find a chamber pot. I don’t think cheese would neutralize the willow bark, do you?” “No,” I said, laughing. “Congratulations—you’ve invented the world’s first cheese-flavored aspirin. They didn’t upset your stomach?”