HA HA HA !!! You can't be serious.....<quoted text>
Even then, the preference is not for "boy" or "girl" but merely types of toys, which are socially designated "boy" or "girl" types. The children only know the difference because they are told they are different. If they are not told they are different, they show no clear preference based on the arbitrary lines.
GI Joe is just a Ken doll, with fatigues, after all.
You don't have kids, either.