I've heard "researchers" say that the behavior of boys and girls is a learned difference and not an inherent one. I still maintain that these people have obviously never raised children.
The twins were given gifts by a lady in the church. They were these cute little teddy bears that recite the "now I lay me down to sleep . . . " poem when you push their paw. When I hand a bear to one of the babies, they would cuddle it or chew it. When my older girls saw the bears, they started cuddling them and playing house. Here is what my son did with the bears today when he noticed them.
I'm in another room and I hear "now I lay me down to sleep . . . " over and over again and then my son cheering loudly at the completion of each poem. I don't think much of it until he runs down the hallway screaming "they tied"!!!! It then occurs to me that instead of cuddling the bears or playing with them lovingly, he was pushing the buttons at the same time to see which bear could recite the poem the quickest. It was a competition.
Learned behavior my foot!!!!