Five monkeys and a ladder

It's a story about an experiment with 5 monkeys. The 5 monkeys were kept in a cage with a ladder. Some bananas were kept on the top of the ladder. Whenever one of the monkeys would climb the ladder to get the bananas, all the monkeys were sprayed with ice cold water. Soon, the monkeys begin to police thmeselves, and would prevent any other monkey from climbing the ladder. Eventually, the cold water was turned off, but the monkeys kept policing themselves. Then, one monkey was removed, and another monkey put in it's place. Sure, the monkey didn't know about the forbidden bananas (must be rotten by now), so when it tried to get the banana, the other monkeys would stop him. Soon, the new monkey started policing the other monkeys too. Eventually, one by one all the monkeys were replaced in the group, but the monkeys kept policing themselves, even though none of the original monkeys weren't there and the reason for policing themselves was not existent