3 Blondes

There are three blondes stranded on an island. Suddenly a genie appears and 
offers to grant each one of them one wish.   The first blonde asks to be 
intelligent.  Instantly, she is turned into a redhead and she swims off the 
island.  

The next one asks to be even more intelligent than the previous one, so 
instantly she is turned into a brunette.  The brunette woman builds a boat 
and sails off  the island.
 
The third blonde asks to become even more intelligent than the previous two. 
The genie turns her into a man, and he walks across the bridge.