This is the famous rhesus monkey experiment by psychologist Harry Harlow. He dragged a group of newly born rhesus monkeys from his mother, and then gave them two stepmothers, one is a barbed wire box that can continuously provide milk, and the other One is a flannel doll that looks like a monkey mother, who can only hug without milk. As a result, the little monkeys would go to the wire box to have milk for a while when they were hungry. The rest of the time they didn’t want to jump on the puppet’s mother to hug them, especially when they were frightened. Although the mother had no facial features and could not move, They looked for safety and warmth on her without exception.
Cruelly behind, Harlow asked the puppet mother to put iron nails and shoot water jets to attack the little monkeys, but they still wanted to hug their mother without hesitation. These little monkeys grew up showing autistic, anti-social or aggressive behavior. . And the little female monkeys didn’t understand sex when they were adults, so Harlow designed a rape frame to let them give birth to the next generation.