"I'm going to keep calling him Dr. Freeman," I said to my parents, Professor and Mrs. Teeth, who had been appropriately impressed with this news. "He's fifty years older than I and I'm pestering him, it would be weird to call him by his first name."
"I think you should call him Walter," said my father. "When I write a letter to a student and sign it Sam, it means the student can call me Sam."
Yikes! "Walter"? "This guy Walter I know"? "You know, Walter, he's a professor at Berkeley"? That is going to take some getting used to. It seems so audacious.