As I'm sure we're all aware (or should be) pain travels through your body at 350ft. per second. No-one likes pain, apart from the attention-seeking emos. So is this really necessary? Pain is useful in many ways. It tells you when you're injured, for instance when you've been impaled in the leg and you fai to notice the copious amounts of blood pouring out of your body.
All of which is inconvenient for us humans - what if our body simply just gave little, unpainful signals? For instance there could be a 'pain indicator' on your forearm, that shows pain with the amount of senstaions you feel on your arm - perhaps one little dot for paper cut pain, 5 for a gash, and 10 for maybe a broken leg with the bone sticking out.
All of which is inconvenient for us humans - what if our body simply just gave little, unpainful signals? For instance there could be a 'pain indicator' on your forearm, that shows pain with the amount of senstaions you feel on your arm - perhaps one little dot for paper cut pain, 5 for a gash, and 10 for maybe a broken leg with the bone sticking out.

Of course, you would also need a another little dot of pain for where the pain actually was, or else you would waste the whole day trying to find an injury thats on your nose.
I have carefully painted red dots on the forearm above (copyright EXPIRED, so don't sue me) to demonstrate the painless signals. Ingenious isn't it?