[user104658]

I was saying to my wife last night... they seem to be VERY similar in terms of how they think, but with major differences (almost opposites) in temperament, with Kay prone to getting down / almost depressed seeming, Lewis prone to anxiety and gets very agitated. It was an inevitable clash, really, because on an intellectual level they like and appreciate each other but in terms of actually interacting, they're totally incompatible.