The Creator, it is to be noted, fashioned all the other organs of sense in pairs, so that if one were destroyed, the other might fill its place. For there are two eyes, two ears, two orifices of the nose, and two tongues, which in some animals, such as snakes, are separate, but in others, like man, are united. But touch is spread over the whole body with the exception of bones, nerves, nails, horns, hairs, ligaments, and other such structures.