There’s been a lot of debate about how often we need to bathe — and the answer might be less than you think. It turns out we have a complicated history with washing dating back to the baths of Ancient Rome. Harry goes straight to the experts to decode the hygienic necessity of bathing versus our societal norms. Plus, he sees what life is like without deodorant. You’ll have to smell it to believe it. If you enjoy Margins of Error, CNN would love to hear from you. Please visit: cnn.com/margins to take a brief survey. To learn more about how CNN protects listener privacy, visit cnn.com/privacy