This search just found me. Regarding psychopathic fathers, this happens all the time. Being in arrested development, the dads view this as the equivalent of childhood sex games. It varies from such games to full sexual relations. The sons often gain a taste for such activity and maintain same sex affairs on the side of normal heterosexual life stories.
I strongly suspect this happened to Rudy Giuliani, it would explain many things. I am absolutely certain that his father was a psychopath. The children of psychopaths tend to have deeply humiliated personalities with similar humiliation patterns. They are very easy to recognize, though they can sometimes be mistaken for psychopaths themselves. I also recommend Wayne Barrett’s book, Rudy! (http://www.barnesandnoble.com/w/rudy-wayne-barrett/1004482941).