This is sort of the reverse to that.
We were told of a person who moved into our housing estate and had a window cleaner come to do her windows. As he was putting out his ladders he banged his arm and came out with a few F**ks.
This woman was shocked and said "I didn't think Jehovah's Witnesses swore."
"I'm not a Jehovah's Witness," said the window cleaner.
"Really?" said the woman, "I was under the impression that you must be. In fact I thought virtually every window cleaner in the county was. Because all of the Jehovah's I have ever met clean windows when they are not out knocking doors."
True story.