"How do you do?" The man greets her in Japanese and bows in his doorway. He wears the same teasing grin and the same rumpled shirt as always. Even the cookie crumbs on his collar seem the same.

"My name is Stanley," he says as he rises. "How nice to meet you."

What can she do? She laughs. She says it is nice to meet him too. Even though he's had more than 20 lessons. Even though he always greets her the same.