Every year more than three million miles of dental floss are sold in the United States. That’s a lot, but the total should be much higher, since that amount works out to only about one flossing per week for the average American. Dentists recommend flossing at least once a day to prevent gum disease, which robs more adults of their teeth than all other oral problems combined. A recent study reported that almost half of Americans feel guilty because they don’t floss their teeth, and 32 percent feel even more guilty for lying to their dentists about it.
Oh, they know when you're lying about flossing. All the blood when they floss you is a pretty good tipoff.