Someone commented that if you look at German WWII nose art, it was always something dark, like skulls, etc.
He said it was a telling commentary on how the two cultures viewed life - ours celebrated it, theirs celebrated death.
Interesting. Like the contrast in these two film excerpts from the early 30s
America:
https://www.youtube.com/watch?v=UJOjTNuuEVw
Germany
https://www.youtube.com/watch?v=Ec0clERjQ5A