I don't know the "why" but it is similar to my experience. My uncle who sexually abused me along with most of his brothers, used to use me for their sadistic pleasure. Once, they put me on a horse bareback, that had not been broken, and slapped it's hindquarter. I went flying across the barnyard and the horse threw me against the barn. They all laughed at my misfortune. I think if they might have also sexually abused me if they had the chance. This incident, and others like it, only confirmed my feeling "owned" by them--especially the uncle who used me as his sex slave for over ten years.
WOR Sequoia 2011--it has changed my life!