Patrick and Steve are fishing on a lake.
After about an hour when neither of them had a bite, Patrick decided to row to the middle part of the lake; where they were very successful
Steve: “This is a great spot for fishing, Pat. We’ll have to mark this spot so we can come back here tomorrow. “
Patrick: “I know, we’ll put an X on the side of the boat to mark the spot. “
Steve: “Don’t be silly, Patrick, that’s no good we might have a different boat tomorrow. “
This joke is included in the Black Book of Jokes. You can order it from here.