Two blonds rented a canoe and went fishing on the lake. After waiting an hour without catching any fish, they decided to go farther down the lake. After two hours of waiting and not catching any fish, they decided to go right to the middle of the lake.
After waiting not even 20 minutes, fish were biting and the two blonds couldn't believe what was happening.
When the canoe was full they decided to go back home and come back tomorrow.
Being safe on land, the first blond said, "I hope you marked the spot if we want to come back tomorrow".
The second blond replied, "Yes, I marked an 'X' at the bottom of the canoe."
The first blond replied, "Twit, what if we don't have the same canoe tomorrow?"