Before they went over to Mallory’s spot, the woman poured milk into her coffee cup. Mallory, who had learned back in college that the woman typically drank her coffee black, asked her about it. The woman stirred in the milk. “Black coffee yellows the teeth,” she said. “I went out with a man a few weeks ago who kept looking at my mouth and running his tongue over his own gums. He told me that my teeth had a tint. Can you believe that?”
