"Apparently it was some unusual family tradition I only learned about after I became 18. Every five years or so, all the adult fertile women in the family would choose one male to breed them all. This time I was chosen, and it rapidly became my favourite tradition. Especially when I learned that I could keep fucking them as often and whenever I wanted to, until the next Choosing. But I did some quick math, and I knew no other men would reach 18 before that, so I was pretty sure I'd be breeding them again."