Few people never get a cavity—an estimated less than 10%. Brushing, flossing, mouthwash, regular dental care, and reducing sugar intake keeps you cavity free.

Maybe you even had sealants put on when you were a kid, which protected your teeth from decay. Another reason for no cavities is low plaque-causing bacteria in your body. As you may know, the human body is full of bacteria—both good and not so good strains. Plaque-causing bacteria is naturally occurring, varies in strength from person to person, and can travel from mouth to mouth. Yes, even by kissing.

As gross as it sounds, this bacteria is living. It feeds, reproduces and grows. Bacteria use starchy, sugary foods to produce the acids that lead to cavities. Removing the harmful bacteria with regular brushing, flossing, and dental visits are the best way to prevent cavities.