Two pieces of string walk into a bar in Germany, circa 1942.
The bartender looks at them menacingly and says, "We don't serve your kind here!"
The two strings sit outside on the curb, thirsty and depressed. One of the strings says, "I've got an idea!" He twists and turns, wriggles, and roughs of the threads on his ends.
The other string says, "What are you doing?"
The roughed-up, twisted string replies, "Watch me!"
Both strings walk back into the bar. The bartender, still in a bad mood, sees the two strings sauntering back in.
He reaches under the bar and pulls out a pistol. He shoots one of the strings dead. BANG.
He turns to the roughed-up string and asks, "Well? You're a string too, aren't you!"
The string replies, "I'm afraid, Nazi!"