You don't have any rear fog lamps in US? What happens when you pull the light switch to the 2nd position? Nothing or you don't have any 2nd step? Mine has 1st step for front fog lamps and 2nd for rear fog lamp.
Well to be honest, sometime I wish we wouldn't have any neither. Some stupid put them on when there's a little fog already. And than forget to switch it off! Might drive you crazy being behind such dumb. Even if you high beam them, they haven't a clue why you're doing it, become confused and get nervous...