We are living bones, and they are hungry. We feed our bones using the teeth, our bone access points. Unfortunately, there's a lot of flesh in the way, and the bones remain hungry even after we've fed.

Sometimes bones live longer than the flesh, and we get zombies.

Sometimes the bones completely outlast the flesh and we get animated skeletons.

If we refuse to accept that we are bones, either of these flesh-based state changes may drive us insane.