Regarding something you've known all of your life, has anyone presented it to you, years later, in such a totally new way that it made a much greater and lasting impact?

This is kind of gross, but it was prompted my the question of how to tell a girlfriend that she has bad breath.

I’ve known all of my life that I needed to floss, and I always have, but it used to be somewhat sporadic. Then about ten years ago a dental hygienist said (as a general observation…I didn’t feel it was directed AT me) “When you don’t floss, it’s like all of that food is sitting in-between your teeth, and just rots, like it does in a trash can on a hot, 98 degree day. Meat is especially bad.”

OMG!!…...Have you ever smelled rotting meat??? OMG! Since then I’m much more regular about my flossing! And I use toothpicks too…....