At first I thought, if I were Superman, a perfect secret identity would be 'Clark Kent, dentist,' because you could save money on tooth x-rays. but then I thought, if a patient said, 'How's my back tooth?' and you just looked at it with your x-ray vision and said, 'Oh it's okay,' then the patient would probably say, 'Aren't you going to take an x-ray, stupid?' And you'd say, 'aw, get outta here,' and then he probably wouldn't even pay his bill. - Jack Handy