"The Lost Old Hat" joke

An elderly man was quite unhappy because he had lost his favourite hat. Instead
of buying a new one, he decided he would go to church and swipe one out of the
vestibule.
When he got there, an usher intercepted him at the door, and took him to a pew
where he had to sit and listen to the entire sermon on the ten commandments.
After church, the man met the preacher in the vestibule doorway, shook his hand
vigorously, and told him, "I want to thank you, preacher, for saving my soul
today. I came to church to steal a hat and after hearing your sermon on the ten
commandments, I decided against it."
The preacher said, "You mean the commandment 'I shall not steal' changed your
mind?"
The old man replied, "No, the one about adultery did. As soon as you said that,
I remembered where I left my old hat!"