There is evidence that Adolf Hitler did have a sense of humour, it’s just that it always required a victim.  His favourite target was Hermann Göring, who was overly fond of awarding himself titles and decorations.  According to a book by Rochus Misch, a telephonist in the Berlin Bunker in 1945, Hitler once told a joke about Mrs Göring finding her husband in the bedroom, waving a baton over his underwear.  When she asked him what he was doing, he replied: “I am promoting my underpants to OVERpants.”