"Blonde and snow cliche"

Here in this site ( now i'm able to put words in it I'm going to check in the "others" sites I'm discovering ) there is a lot lot lot "blonde". And no single one of them are true blonde. That's not really an issue I have never be really blonde oriented. But why on the hell there is such fashion and why the "cliché" of north and east blondiness is such cliché?