You're from a pull tab generation, so you've probably never seen them, but cans of peanuts & coffee use to have "keys" on the lid, with a little slot in them that fit a tab on the side, right below the lid. You slid the slotted key over the tab & twisted, like a modern manual can opener. By the time your can was open, there was a "curly-Q" of metal wrapped onto the key. I stuck one of them into a live wall socket once when I was little. Quite a shocking experience.No, no Im not...... I swallowed vinegar whole once because of it. NO BEUno.