A preacher went to buy a parrot and asked - "Are you sure it doesn't scream, yell, or swear?"
The salesman said, "Oh no, it's a religious parrot," "Do you see those strings on his legs? When you pull the right one, he recites the Lord's Prayer, and when you pull on the left, he recites the 23rd Psalm."
"Wonderful!" says the preacher, "What happens if you pull both strings?"
"I fall, you stupid fool!" answered the parrot.