If the author of Avenue Q is to be believed,"Every one's a little bit racist", and this fact can be a source of much amusement to the rest of the world. We balk at inappropriate comments and giggle at the sheer shock value. In a similar vein, I must laugh at the comments made by a German army instructor who tells his soldiers to fire at the enemy as though the targets were African-Americans from the Bronx who insulted their mothers.
I guess that answers my question as to whether or not Germans appreciate "Yo Momma" jokes. Whoever said the Germans didn't have a sense of humor?