Quote from Phoebe in The One with the Giant Poking Device
Rachel: Phoebe, what? What? Phoebe: First it was my Aunt Mary. And then there was John, my mailman. And then my cowboy friend, Albino Bob. Rachel: And all these people actually died? Phoebe: Yes. While I was in the chair. That's why I take such good care of my teeth now. It's not about oral hygiene. I floss to save lives.