A man runs into a church one night, and stops beside a priest who is praying alone.
"Father!" cries the man, flapping his arms like mad, "Father, please! You gotta help me! I have this crazy idea that I'm a moth!"
"I'd like to help," says the cleric, agape, "but you need a psychiatrist, not a priest."
"Yeah," sighs the man, "I know!"
"Well," says the priest, looking perplexed, "why did you come in here then?"
"Oh, father," the man moans, "The lights are on!"
Wow. It took me a minute, but then I got it. I laughed
What the moth man doesn't realize is that the church is a gigantic bug-zapper of his mind. That's the sick joke behind your real joke.