 Their romantic relationship lasted through the end of the year, but was never untroubled as Mann fought addiction and Curtiss socialized without him.Despite the brevity of their romantic relationship, for years they saw each other or spoke at great intervals, and Curtiss remained "the great love" of Mann's life.Curtiss was interviewed by the Federal Bureau of Investigation about Mann's sexual behavior as part of their surveillance of German émigrées during World War II.