on smartness and dumbness

It just occurred to me why smart people hate talking to dumb people and and vice-versa. It is not at all because of their smartness/dumbness, it is basically because it takes a hell of an effort for smart folks to try and explain things to dumb folks. You need to go to a much lower plain to explain stuff. And it is very much true when you are talking to smarter folks. Your brain will hurt just trying to understand what they say. Yet another reason why i think laziness is perfectly natural.