Well, about the skin. What do you want to hear about your sensory sheath? You know, don't you, that it is your outside brain - ontogenetically the same as that apparatus of the so-called higher centres up there in your cranium? The central nervous system is nothing but a modification of the outer skin-layer; among the lower animals the distinction between central and peripheral doesn't exist, they smell and taste with their skin, it is the only sensory organ they have. Must be rather nice – if you can put yourself in their place. On the other hand, in such highly differentiated forms of life as you and I are, the skin has fallen from its high estate; it has to confine itself to feeling ticklish; that is to say, to being simply a protective and registering apparatus - but devilishly on the qui vive for anything that tries to come too close about the body. It even puts our feelers – the body hairs, which are nothing but hardened skin cells - and they get wind of the approach of whatever it is, before the skin is touched. Just between ourselves, it is quite possible that this protecting and defending function of the skin extends beyond the physical. Do you know what makes you go red and pale?