The Politics of Yecccch.

“Likewise, conservatives are more likely than liberals to sense contamination or perceive disgust. People who would be disgusted to find that they had accidentally sipped from an acquaintance’s drink are more likely to identify as conservatives.” The NYT’s Nicholas Kristof examines the hardwired psychological differences between liberals and conservatives. “The larger point is that liberals and conservatives often form judgments through flash intuitions that aren’t a result of a deliberative process. The crucial part of the brain for these judgments is the medial prefrontal cortex, which has more to do with moralizing than with rationality …For liberals, morality derives mostly from fairness and prevention of harm. For conservatives, morality also involves upholding authority and loyalty — and revulsion at disgust.