Two blondes go on vacation and rent

a boat for the day to go fishing. They lower the anchor and start fishing on the lake. After a really successful days' fishing, one blonde says "We should come back to this same place tomorrow," and so she takes out a marker and draws an "X" in the bottom of the boat. "This will help us find the location," she says.

The other blonde watches and then rolls her eyes. "You idiot!" says the second blonde. "How do you know we'll get the same boat!?"