Fun fact: Despite what deodorant and antiperspirant advertisers have told us, not everyone needs to wear the stuff. Many of us can actually get away without dabbing under our arms as often as we do, and a lucky few don't ever have to
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That's because they're genetically predisposed not to have smelly sweat. Researchers say there are around one million body odor-free people worldwide who have a gene variant known as ABCC11.

The best way to tell if you're one of the curiously scent-free? Your earwax. People who have dry, white, ear wax tend to have less smelly sweat because they're missing a chemical that odor-causing bacteria enjoy feeding on. But those with darker, more oily ear wax should definitely hold on to their deodorants. They've got the chemical in spades.