Of course that's perpetuated when so many use artificial hair colour. Imagine if everyone who covers up their grey hair stopped doing so, then this ‘six years older’ thing would be meaningless. It’d be no big deal as, by the time we reach our mid-fifties, most people have gone at least 50% grey anyway.
For example, you rarely see a middle-aged female TV presenter with grey/white hair, compared to their many male counterparts for whom it doesn't seem to be a problem. (Gets me all feminist, this...) The pressure on women in the media to stay looking younger is colossal and, ridiculously, it seems their jobs can depend on it - but that's a whole topic for another time and place.
Although, seeing as I've brought it up...
Anyway, in the meantime, I'm taking a stand.
White hair is nothing new to me; since late childhood I’ve had one small patch of it – a ‘Mallen Streak'.*
and more naturally by the Millibands
For now, though, I'm finding it oddly liberating and have decided, in defiance of both sexism and ageism, to embrace it. So there!