I'm not going to argue for a genetic preference for lipstick and nail polish, but in the case of trucks and dolls, that could plausibly be based on differing ge

I'm not going to argue for a genetic preference for lipstick and nail polish, but in the case of trucks and dolls, that could plausibly be based on differing genetic preferences for, say, Large Moving Things vs Human Interaction, or something, despite trucks and dolls not having been around for long.