> Nothing similar happens when one monkey urinates on another. The perpetrator does not refrain from urinating, nor does the victim blame the former for the disturbance. Compare this with the behavior of male chimpanzees in captivity, who are able to target and urinate on humans from a distance: they seem fully aware that their action will be considered hostile by the recipient (Valérie Dufour, private communication). I cannot help but think that such contrasting behaviors between Tonkean macaques and chimpanzees are related to the latter’s ability to attribute intentions to others, an ability that macaques lack.
This is the most interesting part to me as a non expert, Chimpanzees are smart enough to but most monkeys can't attribute intention to their fellows?