Free Advice?

At a party of professionals, a Doctor was having difficulty socializing. Everyone wanted to describe their symptoms, and get an opinion about diagnosis. The Doctor turned to a Lawyer acquaintance, and asked, "How do you handle people who want advice outside of the office?" "Simple," answered the Lawyer, "I send them a bill. That stops it." The next day, the Doctor, still feeling a bit reserved about what he had just finished doing, opened his mailbox to send the bills; there sat a bill from the Lawyer.