A new book about humour under the Nazis, Heil Hitler, The Pig is Dead, by Rudolph Herzog, gives some interesting insights into life in the Third Reich and breaks yet another taboo in Germany's treatment of its history. Jokes told during the era, says the author, provided the populace with a pressure release.
Hitler visits a lunatic asylum. The patients give the Hitler salute. As he passes down the line he comes across a man who isn't saluting.
"Why aren't you saluting like the others?" Hitler barks.
"Mein Führer, I'm the nurse," comes the answer. "I'm not crazy!"