Norway was occupied by the Germans in the Second World War, and I've met a lot of people who had to live through that occupation in varying degrees.
Certainly, anyone whom I've witnessed, who has gone through something horrible and life-changing, has a sense of ironic humor, or an ability to look at the peculiarities of the world and find humor in it.
Well, I have a Norwegian father who emigrated to America in the 1950s, and he still speaks with varying degrees of an accent. Over my lifetime my ear has been well-tuned to that accent. Any first generation kid has that wonderful gift from their parents.
Whenever I travel anywhere, I'm constantly asked if I'm Swedish. It's the burden of most Norwegians. The Swedes have just got a better publicity agent, I think.