"Yet it is true—skin can mean a great deal. Mine means that any man may strike me in a public place and never fear the consequences. It means that my friends do not always like to be seen with me in the street. It means that no matter how many books I read, or languages I master, I will never be anything but a curiosity—like a talking pig or a mathematical horse."

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Whatever one of us asked the other to do - it was assumed the asker would weigh all the consequences - the other would do. Thus one might wake the other in the night and ask for a cup of water; and the other would peacefully (and sleepily) fetch it. We, in fact, defined courtesy as 'a cup of water in the night'. And we considered it a very great courtesy to ask for the cup as well as to fetch it.

— Sheldon Vanauken