It’s a controversial opinion but sure is interesting. Keep this in mind next time you encounter someone “hygienically challenged” … Jessica Marshall writes in Discovery News:
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More controversially, some argue that effects of disgust are even more far-reaching, influencing how societies operate and possibly forming the evolutionary foundations of morality.
“If I go around leaving poo in your front lawn or spitting in your cups or making nasty smells in public transport or if I go to church in my pajamas, I’m threatening you with my bodily fluids,” Curtis said. “These are manners, but they’re also the precursor of moral behavior. That’s at least one of the ways that morality could have evolved in society: simple rules about not getting other people sick with your emanations.”
Studies have even shown a connection between physical disgust and moral disgust, Curtis said. “If you sit people in a room with bad smells, they punish more severely,” she said.