Ghengis told me this story and while I haven't been able to validate it, I can't help myself and propagate it anyway.
Evidently, a golf club manufacturer noticed something odd in its sales figures not so long ago. It seems that in the United States their sales of left-handed golf clubs was found to be about 3% of total US sales. It wasn't this figure that was considered particularly interesting, it was this one: sales of left-handed golf clubs in Canada were closer to 15% of total Canadian sales of golf clubs.
Now, before you ask, let me state that there is no discernible difference in the percentage of lefties if you compare the two countries (unless you are looking at political stripes, that is)
So why the difference?
<insert dramatic pause>
Apparently, when young Canadian boys start playing hockey, they are encouraged to shoot from the side that feels most comfortable. The choice from which side to shoot is not necessarily made by defaulting to the your 'dominant' hand. That's why hockey cards will tell you if a player 'shoots right' or 'shoots left'.
So when these Canadian boys grow older and take up golf, many of the left-shooters pick up a left-handed golf club.
Some don't though. Ghengis is a lefty who shoots left but swings right because he got started in golf with used right-handed clubs from his dad.
Canada: more lefty than you think.