Mist I know you don't have kids so I'll just ask - have you ever been around kids? Its pretty obvious that boys and girls just innately enjoy doing different things even as toddlers. They don't even have a particular gender identity at 1 year old, and the boys walk sooner, hit things with other toys as a basic instinct, are more territorial and aggressive, etc than girls. Girls talk and read sooner, are more content to be docile and sit in one area, etc - you can see this at the earliest ages. There are obvious exceptions but boys and girls are just different, and its not modeling or mentoring.