system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: why do teeth have nerves? Is there a greater reason then just making your day a living nightmare?
gpt
Infected teeth can kill you as the infection can easily make it into your blood stream and to the rest of your body. It's best that you're well motivated to fix them.  This is just as true today as it was for primitive man, and probably more important, since we eat so much more sugar now.