These coatis used to be kept as pets at a very young age. But in spite of having been legally bought, coatis are still wild animals, and make terrible pets, even though they extremely cute and makes you want to cuddle them. So, after a little while, their owner realized that was a really bad idea, donating them to an institute that could care for them properly. But those animals, growing up as pets, could not be released, for they are now humanized, and are no longer afraid of people. So they started being used for educational purposes, so that students could learn how to properly handle wildlife, but in order to do that, they would have to not attack the students handling them, which, for a coati, is a lot to ask. So their caretaker had to sit with them, every day, for them to get accustomed to it, and cooperate, otherwise they would simply be animals in captivity. And, well… they think that people's shoulders were made just for them to sit on!