system
Given the following post, respond as if you're commenting on Reddit:
human
Why do Asians have dry ear 'powder' and Westerners have wet ear 'wax'?

Edit: Not ALL Asians have dry ear wax and not ALL Westerners have wet. And Thanks for all the input from the pro's.
gpt
There may be an answer to this question, but in evolutionary genetics, you should always keep in mind that there is not necessarily a *reason* for differences between populations. If a mutation occurs that does not reduce fitness, then the mutation may persist even if it does not increase fitness. So it is possible that a mutation occurred that caused the dry earwax randomly in an Asian person, and the dry type worked about as well as the waxy type. So over many many many years that mutation came to persist across the continent. So it may not be that dry ear wax helps you survive better in Asia or something like that, just that the random mutation happened to occur in Asia.