Well, the fact is, men and women are different physically, psychologically, motivationally, and temperamentally. Anyone who has had exposure to babies and children can tell you that boys and girls respond differently to the world right from the start.
Give both a doll and the girl will cuddle it, while the boy will more likely use it as a projectile or weapon. Give them two dolls and the girl will have the dolls talking to each other, while the boy will have them engaged in combat.
