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Using modern prevalence of the dry-wax gene as the basis for probability simulations, the authors estimated that the dry form of the gene diverged from the default wet version 2,006 generations back, or about 50,000 years ago (which lines up well timingwise with the out-of-Africa theory); (2) the speed with which the new gene spread through Asia suggests it conferred some evolutionary advantage; and (3) among modern Asian, Native American, and European populations alike, the dry-wax gene is more common the further north you go — supporting the earlier idea that maybe it helped humans thrive in the cold.

https://www.straightdope.com/21344485/why-is-asian-earwax-di...

Yes, an ENT told my wife that those of Asian decent more commonly have “sticky” ear wax.

It is the opposite. People of Northeast Asian descent more often have “dry” earwax, associated with a recessive allele of the ABCC11 gene. https://en.wikipedia.org/wiki/Earwax https://en.wikipedia.org/wiki/ABCC11

Yes, as mentioned in the post:

> Dry wax, which is grey and flaky, is commoner in Asians. Wet wax predominates in Africans and Caucasians, and is brown and sticky.

This is my understanding, but I don't remember where I've read it.