At one time I was living in a very nice apartment, and the building next door had a private dentist. Absurdly expensive, but convenient. So I got a toothache an

At one time I was living in a very nice apartment, and the building next door had a private dentist. Absurdly expensive, but convenient. So I got a toothache and booked an appointment for the next morning, but the next day my toothache was gone. After taking the x-ray and examining it with me the dentist asked me which side the toothache was on. For some reason I said the left. He pointed at the left side of the x-ray and explained why I needed a filling. Then I remembered it was the right, and corrected myself - he looked at the x-ray again and started to explain why I needed a filling on the right side. I left in disgust and haven't had a toothache in the ten years since.