Part 3 from The Voyage of the Dawntreader:
“Then the lion said — but I don’t know if it spoke — You will have to let me undress you. I was afraid of his claws, I can tell you, but I was pretty nearly desperate now. So I just lay flat down on my back to let him do it.
“The very first tear he made was so deep that I thought it had gone right into my heart. And when he began pulling the skin off, it hurt worse than anything I’ve ever felt. The only thing that made me able to bear it was jut the pleasure of feeling the stuff peel off. You know — if you’ve ever picked the scab of a sore place. It hurts like billy-oh but it is such fun to see it coming away.”
“I know exactly what you mean,” said Edmund.
“Well, he peeled the beastly stuff right off – just as I thought I’d done it myself the other three times, only they hadn’t hurt – and there it was lying on the grass, only ever so much thicker, and darker, and more knobbly-looking than the others had been. And there was I smooth and soft as a peeled switch and smaller than I had been. Then he caught hold of me – I didn’t like that much for I was very tender underneath now that I’d no skin on — and threw me into the water. It smarted like anything but only for a moment. After that it became perfectly delicious and as soon as I started swimming and splashing I found that all the pain had gone from my arm. And then I saw why. I’d turned into a boy again. . . .”