Mickey was an amateur boxer and former Marine trying his best to become a professional boxer. until a car accident left him in equestria with no way to return home. He was tried with a regular physical and they took samples, blood, hair, and sperm. He was asked to be what is called a breeder for the equine nation. That's where he drew the line, he now spends his time as a lumberjack and inventor.
(This is a story that will bring up the topic of rape, PTSD, and other related themes. You have been WARNED.)
(Now has a sequel. /story/363152/mickeys-random-adventures)