I'm going to assume that when you open a can of anything and you use a hand held can opener you have the handles on the side of the can. You crank and cut the top open. Yeah, that's not how you're supposed to do it. Don't worry, I thought that's how it was done and have used the can opener that way for as long as I can remember.
Let's all watch the video below and learn how you're actually supposed to open cans. It actually looks much easier and less dangerous (the edge of that can top are pretty sharp). If we do it this way, we won't have to worry about cutting ourselves anymore.