https://pacheco-torgal.blogspot.com/2020/12/the-repugnant-face-pandemic.html
Still following the hypothesis mentioned in the post above check the recent paper published in the Proceeding of the Royal Society B (Biological Science) that reports a relationship between facial attractiveness and immune function.
The authors hypothesized that facial attractiveness being related to a stronger immune system potentially benefits the survival of our offspring. The problem (in my opinion) is that rating the level of attractiveness of people in pictures is not as accurate as “asking” our microbiome to perform the right choice as was written by William B. Miller Jr below:
“The combination of immunological capacities of healthy mates that differ confers better protection to the next generation…we seem to search for other sexual partners that are not our match immunologically…On an evolutionary basis, our species is best protected by the mixing of opposing genes and microbes.” https://www.amazon.com/Microcosm-Within-Evolution-Extinction-Hologenome/dp/1612332773
Pacheco-Torgal 