Don’t be a monkey!

Scientists put five monkeys into a cage, with a ladder leading up to a bunch of bananas. But every time a monkey tried to go up the ladder, the other monkeys were soaked with cold water. Soon enough, the monkeys would violently prevent any monkey from going up the ladder. The scientists then switched one of the monkeys with a new one. After he was prevented from climbing the ladder, they switched a second monkey for a new one. The monkey who had been introduced previously joined his friends in attacking the new monkey when he tried to go up the ladder. By the end of the experiment, there were five monkeys who had never gotten wet, yet who all would not climb the ladder. What does this say about peer pressure?