"A few Polish jokes." joke

Q: Did you hear about the idiot that locked his keys in his car?
A: Took him an hour using a coat hanger to get his family out.
Q: Why do idiot dogs have flat noses?
A: From chasing parked cars.
Q: What did the idiot mother say when her daughter said she was pregnant?
A: "Are you sure it's yours?"
...and finally: Q: How do you keep an idiot in suspense?