Mr. Norrell (who knew there were such things as jokes in the world or people would not write about them in books, but who had never actually been introduced to a joke or shaken its hand) considered a while before replying ...
Susanna Clarke, Jonathan Strange & Mr. Norrell
I just love the way that is put. I have actually met two people who have no sense of humor at all. One makes a joke or quip and they just look at you expressionlessly and then move on with the conversation. It is very disconcerting, just like meeting Mr. Norrell probably was.