"When you spend a lot of time with someone," she said, "you begin to favor them."
"Do you mean like old men favor their good leg," he said.
"No," she said, "I mean you start to look like them." She studied herself in the dusky train window. "Every time they visit you, they leave a trinket in your house. Every time you visit them, you take something home in your pocket. And then you begin to recognize yourself everywhere," she said.