I sensed that if I were ever to meet [Senator Orrin] Hatch face-to-face there would be little that we could agree upon. There was something about watching Hatch that reminded me of unpleasant, futile political arguments I had had in my life. I wondered whether such political disagreements did not issue from underlying, perhaps even innate characteristics. Certainly, experience teaches us that when we encounter another person whom we instinctively dislike, constructive political dialogue is not likely to follow. Humans can intuitively sense through a variety of subtle clues (i.e., dress, accent, gestures) when another person possesses a mix of cultural and psychological characteristics that is so substantially different to our own that political discord is also likely. Put otherwise, a liberal can usually smell a conservative, and vice versa. Moreover, the smell is not a pleasant one.-- Red Genes, Blue Genes: Exposing Political Irrationality