A boy is selling fish on a corner. To get his customers' attention, he is yelling, "Dam fish for sale! Get your dam fish here!"
A pastor hears this and asks, "Why are you calling them 'dam fish.'"
The boy responds, "Because I caught these fish at the local dam."
The pastor buys a couple fish, takes them home to his wife, and asks her to cook the dam fish. The surprised wife responds, "I didn't know it was acceptable for a pastor to speak that way."
He explains to her why they are dam fish. Later at the dinner table, he asks his son to pass the dam fish.
He responds, "That's the spirit, Dad! Now pass the f**king potatoes!"