Funny Blonde Joke

There are three blondes on an island. A genie says they can only have one wish t get themselfs off. The first says" I wish I was smart" so she turns into a red head and swims off the island. The second says " I wish I was smarter than her" so she turns into a brunette and swims away. The third one says " I wish I was smarter than both of them" so she turns into a man and walks on the bridge.