Hitler was aware of Röhm's homosexuality. Their friendship shows in that Röhm remained one of the few intimates allowed to use the familiar German "du" (the German familiar form of "you") when conversing with Hitler. In turn, Röhm was the only Nazi leader who dared to address Hitler by his first name "Adolf" or his nickname "Adi" rather than "". Their close association led to rumors that Hitler himself was homosexual. Unlike many in the Nazi hierarchy, Röhm never fell victim to Hitler's "arresting personality" nor did he come fully under his spell, which made him unique.