Three girls were on a boat with the driver, a blonde, a brunette and a redhead. The boat got a hole in the bottom and started to sink. The driver said "someone has to swim to land, its 20miles away." The brunette swims 10miles, gets a cramp and drowns. The redhead swims 14miles gets a cramp and drowns. The blonde swims 18miles, gets a cramp and swims back to the boat.