Physically,paper cuts hurt as much as they do for a variety of reasons.They typically occur on parts of our bodies that are the most sensitive,such as the fingers,lips or tongue.The nerve networks of these body parts can discriminate with exceptional clarity and specificity,sensations of pressure,heat,cold and injury.Our brains even have speciallized areas to receive signals coming from these parts in high definition.The exquisite sensing abilities that makes our fingers,lips and tongue so good at what they normally do,also makes injuries all the more painful.