Toothache

Toothache has long been a first-order philosophical problem. Dostoevskii's Underground Man frets about it at length, Wittgenstein treats it as an irrefutable data point in his musings around solipsism. One wonders if, in fact, toothache might make you deep. Dunno. I may have been deeper back when my teeth were less messed up.

Young people out there, one word: Floss.