Nature made it so women get pregnant, carry the infant and nurse it. While fathers are expected to be hands on nowadays, that wasn’t always the case, or their role was more protector/provider/teacher than a physical nurturer to an infant. read more
In an incredibly ingenious study, published in Evolution and Human Behavior, Alexander and Hines gave two stereotypically masculine toys (a ball and a police car), two stereotypically feminine toys (a soft doll and a cooking pot), and two neutral toys (a picture book and a stuffed dog) to 44 male and 44 female vervet monkeys. read more