[Walks on Clouds]

There is a thing I've pondered on for some time now. It's this:

Do all nationalities joke about their neighbours? For example there is an immense supply of jokes about Norwegians in Sweden. (Possibly because of centuries of cat-and-mouse like politics and occasiopnal warfare.)

I will risk my reputation by giving you a typical example, hoping there are no Norwegian citizens on this forum...

Here goes:

"Why do Norwegians always bring a car door with them when they go into the desert?"
"Because if it gets too hot, they can roll down the window."

Do you americans do the same thing? I've been wondering during some of my more philosophical moments.