"Three Blondes on an Island!" joke

Their were three blondes on an island, not to far away from the other side, but far enough not able to swim across.
One of the blondes goes up to a lamp on the sand and rubs the lamp. The genie comes out and says, "
I will give you each one wish."
One of the blondes walks up and says, "
I
wish to be 10 times smarter!"
The genie grants her wish and she builds a raft to go to the other side.
The second blonde walks up to the genie and say, "
I wish to be 100 times smarter!"
The genie grants her wish and she builds a helicopter and flies across.
The last blonde walks up to the lamp and says, "
I wish to be a brunett!"
So the genie grants her wish and she walks across the bridge.