Three blondes are stranded on an island. They find a lamp and rub it and out pops a genie. “I will grant each of you one wish” the genie said.

The first blonde said that she wished to be smarter than the other two, and she turned into a brunette and swam off the island.

The second blonde said that she wished to be smarter than the other two, and she turned into a red-head and built a raft and rowed off the island.

The third blonde wished to be smarter than the other two, and she turned into a man and walked across the bridge.