Ever wondered why other people are so bad at picking out perfume for you, or how you just instinctively know when a scent is "right"? New research from Charles University in Prague suggests that we pick scents to amplify our body odor, not cover it up. And since every person's BO is unique (like a grimy, noisome snowflake), other people tend to do a bad job of picking scents for us, while we almost immediately know which ones will work.
Why on earth are we doing this in the first place, though? To find the right mate, of course. Our sweat broadcasts a bunch of signals about everything from our health to what kind of immune protections we have. People with different-but-not-too-different immune complexes produce the healthiest babies, so we're always trying to sniff out that special someone who has everything we need: good health, a great smile, and that bubonic plague immunity gene we're missing.