The human body is a fascinating, and oftentimes disgusting, thing to study.
While everyone has their own unique way of going about things, certain elements of the human condition are universal: we eat when we're hungry, drink when we're thirsty, sleep when we're tired, and — if no one is around and there's no Kleenex in sight — we eat our own boogers.
Turns out we shouldn't, and not just because it's gross.