Doctors are expected not just to diagnose and treat diseases but to prevent disease by counseling patients about behaviors that expose them to risk.  We are expected to ask patients about smoking, alcohol use, high-risk sexual behavior, failure to use seatbelts and dancing on windowsills.  We are expected to counsel our patients to refrain from behaviors that may lead to injury or disease. “Mrs. Jones, I’m very worried about the fact that you grease your stairs with motor oil.  I advise that yo...