Given these facts, touch cannot be associated solely with the skin in any simplistic way. The skin contains a heterogeneous set of distinct receptor populations, and these populations differ in their physiological and functional properties. In addition, our ways of classifying elements as part of touch don’t seem sensitive to any of these differences in obvious ways. It thus seems clear that the sense of touch isn’t simply that form of perceptual awareness constituted by signals made available through the receptors in our skin.