I remember opening a soda pop for my parents using a proper old can opener. Some times I even used one to open whole cans of food....they were brilliant. Start punching, and punch around the top until the whole top was off. It may have left a sharp lid and can, but it worked every time.
....outfitted with various unsuccessful pop-tops, some of which would slice open a finger.
LOL, some of us are probably not recognizable from our birth fingerprints because of those things.
My state must have been prescient. The birth record has footprints.