Obsessing over personal hygiene is more of a social norm than a biological need
Stepping into a hot, steamy shower every day isn't just comforting -- it also seems like the proper adult thing to do, assuming you're lucky enough to have a job. No one wants to be the smelly person in the office, and washing away the dirt and grime you've accumulated seems like a common-sense way to stay healthy.
But Americans are sudsing up way too much. Compared to other well-off countries, people in the US admit to showering an average of around seven times a week -- like, every freaking day, sheesh -- which is more than the five times a week for people in China, Britain, and Japan. And while French and Spanish people shower around the same number of times as Americans, they shampoo much less frequently -- the French, for example, shampoo just twice per week.