Three ministers were out on a lake fishing one fine afternoon. A Protestant minister, an Episcopalian priest and a Catholic priest. They were sitting out in the middle of the lake and the Protestant minister said he had to relieve himself, so he got out of the boat and walked across the water to shore, relieved himself behind a tree.

Then walked back to the boat. The Episcopalian priest did the same thing. The Catholic priest thought to himself, if they can do it, so can I. So he stepped out of the boat and promptly sank to the bottom. The other two looked at each other and one said "Do you think we should have told him about the rocks just under the water?"