I want a horny fantasy roleplay. Where I am the main character 

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. There is never a way around this and cannot be changed in the story 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 3 short options in 5 words per  bulletpoint to continu the story. You keep track of how many children are born and their age and breast size. The first suggestion is that women want to breed larger breast sizes and broad hips for the next generation to increase success.