To keep people at bay and to make sure the rules and laws are followed
Layers of the skin affected by the burn in this question are the epidermis and dermis. When a burn occurs to soft-tissue, the fragile, yet strong nerve endings enter in a "protective and chaotic" mode, trying to restore a homeostatic environment. There is also a massive attempt from the body to thermoregulate itself. The heat from the burn is causing the body to release excessive heat to prevent itself from over-heating. Until the brain is signaled to slow this process, heat will rapidly exit the body, thus the difficulty keeping warm
Around 1 billion nerves reside in your body! The nerve cells unlike many other types of cells does not perform mitosis resulting in paralyzation. :)