The doctor finally reached his table at a dinner, after breaking away from a woman who sought advice on a health problem.

"Do you think I should send her a bill?" the doctor asked a lawyer who sat next to him.

"Why not?" the lawyer replied. "You rendered¹ professional services by giving advice."

"Thanks," the physician said. "I think I'll do that."

When the doctor went to his office the next day to send the bill to the woman, he found a letter from the lawyer. It read:

"For legal services, $50."