system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does stubbing your toe hurt so much?
gpt
We have a lot more nerve endings that feel pain in our feet (and hands and mouth and genitals) than in other parts of the body.  for a large part of human existence, our feet would engage with our environment a lot and so it needed to be able to take in more information than, say, our shoulders do. More nerve receptors mean we can tell different terrain. We can distinguish between plants and pebbles and snakes and if something is slimy or slippery or hot or cold.  But it also means a stronger pain response. Yeow!