“The Reaction of Monkeys to ‘Fearsome’ Pictures”, 1974-10-11 (; backlinks):
The phenomena a man or animal most needs to know and understand must often be potentially dangerous or discomforting.
We report here evidence that rhesus monkeys, given the opportunity to look at a picture which excites both interest and fear, choose first to look at it and only later, once their interest has abated, to avoid it.