MAKES SENSE; APES SHOW THEIR TEETH BECAUSE THEY ARE AFRAID OF THEIR OPPONENT, SO SMILES EVOLVED INTO SHOWING YOUR HUMILITY; HUMANS ARE HIGHLY SOCIAL EVEN WITH OTHER SPECIES, SO THEY CAN BE TRUSTWORTHY; YUP; AND WE USED TO BE ON AN HERBIVORE DIET AND WERE PREY; ALRIGHT; AND DUE TO BEING PREY WE LIVED ON TREES WHICH NEEDS DEPT PERCEPTION TO NOT FALL DOWN; FORWARD FACING EYES MEAN PREDATOR
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