A piece of popcorn got stuck in my gums. When did this happen? I ate popcorn a few nights ago, that must have been when. But what if it wasn't? How long can one of those flat kernel shells parade as a tooth, rammed deep into the space between the actual tooth and the gum-line? Weeks? Months? What if this was a piece of popcorn from my last trip to the zoo in 1990? Yuck.
