User blog comment:Sanjithechief/Why allways the left side?/@comment-3079795-20110517003958

After reading all the below comments I think it's simply that that's how it's drawn. There's no real reason for it.

But here's a theory. If the Japanese read right to left thats how they would look at pictures too. If we are looking at a character their left is our right. So maybe it's just done like that to make the marking or lack of arm easier to notice (not that it'd be easy to miss otherwise).