Is there a gene for nagging? There's probably a bloke somewhere peering down his microscope, searching the x-chromosome for it, on the basis that 'only women do it, so it must be sex-determined'. But if you want a reason why women nag look no further than the size difference between them and men. What else can a woman do? There are only two things to be done. Either let them have their way or mount a verbal campaign, in the hope that they will be worn down in time.