Yuck! It’s hard to suppress a shudder of disgust at the sight of a slug sliming its way across the sidewalk … or a cockroach scuttling across the kitchen floor. Are such responses instinctive? Why are people more likely to develop phobias for slugs, maggots, and cockroaches than for mosquitoes or grasshoppers?
Vassiliy Vishnevskiy/iStockphoto
Fotosearch
Fotosearch