Atheism

Atheism is a non-prophet organization.

Nudist Camp

A hole has been found in the nudist camp wall. The police are looking into it.

Flies

Time flies like an arrow. Fruit flies like a banana.

Silk Worms

Two silk worms had a race. They ended up in a tie.

Obama and Media

After Barack Obama won the election he found out the economy was worse than he thought; so he had to lay off seventeen journalists.

Litter

A dog gave birth to puppies near the road and was cited for littering.

Push the envelope

No matter how much you push the envelope, it'll still be stationery.

(To learn more about where the expression came from, go to this link http://www.phrases.org.uk/meanings/push-the-envelope.html