SCIENTISTS have confirmed what fans of John Travolta in Saturday Night Fever have known all along: men with the best dance moves have the most sex appeal.

The finding lends support to the idea that dancing is a way to show off high quality genes and good health - both indicators of a top quality mate.

Charles Darwin was the first to suggest that dance was a courtship signal in animals, but there had been no studies of the relation of dance and genetic or physical quality in humans until now.