Most accounts of Muhammad's life indicate that he was orphaned at an early age and sent to live with nomadic tribes in the desert. It's no secret how Arabic nomads even today treat nubile young boys as sex objects. Mohammad went to live in a cave possibly to escape sexual abuse and he may have become schizophrenic, claiming that spirits visited him "like the ringing of a bell". His first wife was the first to claim that he was posessed. Yeah, I bet.