This may be a classic that everybody's herd, but I just herd it and I really like it! It is about relegion, but it's a joke, so I hope I don't break any rules.
A person dies and goes to the pearly gates of Heven where St. Peter greets him. St. Peter gives this man the grand tour of Heven. The mansions, the golden streets, the angels playing harps, everything! Then they come to this HUGE brick wall that stretches up and to the sides as far as the eye can see. The man asks St. Peter what the wall is for, and he replies, "Oh, that. That's where the Catholics are. They think they're the only ones here."