I want a horny fantasy roleplay.

I want the following facts considered.

I am the only man left in the world.

Other women found out and are hunting me to capture me and let me breed continuously and involuntary. I would be raped constantly because they want to continue the race.
The youngest women may breed first. 
They are building a society around me and take very good care of my balls and penis. 

They find out that there wil be never another boy born again, only girls. So how are they going to continue the race. They find out I am immortal so that is lucky. Every girl will be pregnant the first time they try 

You give me options to continu the story. You keep track of how many children are born and their age