A blonde, a redhead and a brunette are stranded on an island...

A blonde, a redhead and a brunette are stranded on an island...

Suddenly, the brunette spots land not far from the island.

She tells the other two: "I'll swim there and come back with help"

But as she is swimming, she gets tired a quarter of the way there and swims back.

The redhead says: "Don't worry, I'm confident in my ability to swim there and come back with help"

But she gets tired a third of the way there and swims back.

The blonde says: "You guys are weak. I'm sure I can get there and come back"

But she gets tired halfway there, turns around and swims back!