There are jokes about teeth.

Xiaohong: Xiaoming, why didn't you come to class yesterday?

Xiaoming: I have a toothache. I went to the hospital to have my tooth extracted.

Xiaohong: Does your tooth still hurt?

Xiaoming: Then who knows, the dentist has that tooth.

Do you want to have good teeth? Here are three lessons for you: first, rinse your mouth after meals and brush your teeth in the morning and evening; Second, go to the hospital for a dental examination every two years; Third, mind your own business.