QotM. #0175:
Luke: "Mommy, did you get your teeth cleaned?"
Mommy: "Yes, I did. Do you want to see? {showing him} Do they look clean?"
Luke: "No. I think you need to try again."
Bonus "Mommy went to the dentist" material:
Daddy: "Where is that lady running to?"
Luke: "Mexico. That's where Mommy just went to clean her teeth."