I remember the day that my 3 year old son took his Elsa doll to Kindergarten. I don't know what they said to him, but after that day he declared his favorite co

I remember the day that my 3 year old son took his Elsa doll to Kindergarten. I don't know what they said to him, but after that day he declared his favorite color is now black and he no longer wanted the doll. I'm sure there are some genetic sex differences, but looking at the huge difference in how society treats kids from the youngest age on, I'm going to say it's very hard to differentiate between genetic vs. society.