Which is the right way to use these pedals?

[Heifzilla]

Thanks for that link! it does appear that the smaller side of the pedal is supposed to be forward, with the teeth downward.

These are my pedals. And I have been riding with the teeth upwards since I got the bike. I too figured they were to help keep your shoe on the pedal. I've also been working out some numbness issues in my feet. Since I raised my saddle, it hasn't been as bad, but still there on occasion. Today I was riding and for some reason, I had the thought that maybe having the teeth pushing up into my feet as I pedaled was part of the issue. So I flipped the pedals over and at first it felt really weird because there wasn't that pressure there but after a while I got used to it...and, lo and behold, I wasn't having any of that tingling sensation I'd been getting in my feet. So, it got me to thinking that perhaps I'd been using my pedals the wrong way. When the teeth are up and forward, it seems like a lot of my weight is on the smaller section of the pedal, and I wonder if my foot was flexing over the edges of the pedal, combined with the upwards pressure from the teeth on my foot...maybe that is part of the issue.

So, that's why I asked this. I know it seems like using a platform pedal should be obvious, but I wonder now if it really is, especially for pedals that are not exactly the same on all sides.