Every day of their vacation, these two guys rented a boat and fished. One day they caught thirty fish.

Joe said, "Moe, mark this spot so that we can come back here tomorrow!"

The next day when they were driving to rent the boat, Joe asked, "Moe, did you mark that spot?"

Moe replied, "Yep. I painted a big 'X' on the bottom of the boat!" Joe growled.

"You old fool! What if we don't get the same boat today?"