Earwax

If you're Euro or Afro, it would be a good bet
That that stuff in your ears is gonna be wet.

But, if, perchance, you hail from Asia
Here's some news that's bound to amaze ya:

For years, the world wondered why your earwax was dry;
Now science has answered the who, what, and why.

It involves genetics, though some may regret it
For your earwax, it seems, has a definite link
To how much (or how little) your body does stink.