‘It has been said that a man will try to make it with anything that moves – and a woman won’t. Now the startling new science of sociobiology tells us why,’ crowed Playboy magazine in 1979, in an in-depth feature bursting with Schadenfreude. ‘Darwin and the Double Standard’ accused feminists of defying their biological heritage, claiming, ‘Recent scientific theory suggests there are innate differences between the sexes and what’s right for the gander is wrong for the goose.’