When I'm flossing my teeth lately, there's a spot on the top left that gives me trouble. By which I mean: even when there's nothing visibly stuck between those two teeth, I can dip under the gumline and tease out a chunk of stuff the size of a smoked ham. And then I can do it eight more times.
It's kind of worriesome. Like...how far back does this particular interdental crevice go, exactly?!?!? I'm starting to think those two teeth form a gateway to Narnia.