How Cats Defeated Hitler

In an underground cafe in Berlin, sitting at a table with a bottle of something dark and crisp, an old man hobbles up to me and hands me a fluffy grey cat.
“Cats defeated Hitler,” he said, smiling.
And he walked back into the shadows.
I looked at the cat.
The cat looked at me.
And purred.
I wanted to get up and follow the old man and ask him what he meant, but the cat was so soft and furry, and the purring was so nice.
So, I just sat, drank my beer, and surrendered to the grey cat.