Kent Enfield wrote:
It's sort of like asking, "Why can't I drive on the left side of the road?"
Hi, in the UK we do drive on the left side of the road!!
As far as I am aware this came about because traditionally your sword hung on your left (both when walking or mounted) and it became standard for folk on horseback to stay on the left side so as to be able to defend themselves on the road as it were!! Also, when walking with a lady on your arm, she too was on the left side so that you could still draw steel and defend her if the need arose!!