Frankly, my dear - it hurts like a sonuvabitch

When Clark Gable developed an infection in his gums, MGM's Louis B Mayer paid to have all his teeth extracted and he wore a false set of teeth for the rest of his career. Apparently 1930s dental appliances caused terribly bad breath. Poor Rhett and Scarlett - as if they didn't have enough to overcome with the burning of Atlanta! Halitosis will kill any relationship.