Pretty sure we are the only animals with pink rings around our mouth. It’s flipping weird.
It probably helps with verbal language understanding as humans often use mouth movements to interpret words (see McGurk effect). But I still think it’s weird.
Big pink rings.
So other primates in the ape family. The same one humans are from.
I agree some apes have them but not other non-primate animals.
It’s likely we evolved ours for speech and emotion communication.
I still think it’s weird that we have them. A big pink noodle ring around the mouth.