Just as the flu and social networks might make you fat, you need to regularly brush, floss and rinse to avoid going cuckoo-crazy. Which is bad news since most of us can't afford to go to the dentist at all.
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.