I have heard the men's and ladies' explanation before, yeah, and have noticed it with buttons and which side the "fold over" on zippers is, but I just have never encountered a hoodie or jacket with a zipper on the right side, neither had the one who got it (until now). The jacket I'm wearing now is a men's jacket, but the zipper is on the left side. So are the zippers on all my other jackets, both ladies' models and men's models, as well as the men's hoodies from H&M. I'm confused.
Not that it really matters, but a zipper on the right side felt all kinds of awkward.