What if, the world was spilt right down the middle? Men ruled one half of the world while woman ruled the other half. In the beginning this system was only created to see, who could handle government better but now it's the way of the world

     Five Laws in both societies

1.  Never speak of the other sex
2.  Never replicate naturally
3.  Pleasure robots are not to look like the other sex
4.  Remove the other sex from all history
5.  Never cross the line into the other society