[08-15]

Because if you give children a set of toys that includes both cars and dolls, the girls tend to play with dolls and the boys tend to play with cars. Many boys play with both---they use the cars to run over the dolls.

And that happens even in African tribes where most people have never seen a car in their lifes, which pretty much falsifies the modern theory that all differences are due to boys wearing blue and girls wearing pink.

[collyw]

It happens in monkeys as well.

https://www.newscientist.com/article/dn13596-male-monkeys-pr...