Our descent, then, is the origin of our evil passions!! The devil under form of Baboon is our grandfather.
The young blush much more freely than the old but not during infancy, which is remarkable, as we know that infants at a very early age redden from passion.
Blushing is the most peculiar and the most human of all expressions. Monkeys redden from passion, but it would require an overwhelming amount of evidence to make us believe that any animal could blush.