Fishing Spot

These two Polish guys rent a boat and go fishing in a lake. They are amazed at the number of fish that they caught that day, so one says to the other:

- We'll have to come back here tomorrow!

The other asks:

- But how will we remember where this spot is?

The first guy then takes a can of spray paint, paints an X on the bottom of the boat, and says:

- We'll just look for this X tomorrow.

The other guy says:

- You idiot! How do you know we'll get the same boat?