I sat down on the edge of the bathtub, disconcerted because I had started talking to myself for the first time since I was a child. By talking rather loudly to himself, the child had provided himself with a companion. But here, where I had decided for once to observe rather than participate, I was at a loss to see why I was doing it. I began to giggle and finally, in a fit of exuberance, punched myself in the head so hard that I almost toppled into the bathtub.