Humans are the only species that blushes.... Or has reason to.
- Mark Twain
I love that one joj!
A strong emotion can make your face light up like a cherry
https://vitalrecord.tamhsc.edu/you-asked-what-causes-blushing/
"Charles Darwin first referred to blushing as “the most peculiar and most human of all expressions” in The Expression of the Emotions in Man and Animals."