Here’s the kicker: you’re not tasting the spoon. Metal atoms are too big for your taste buds to register. You’re tasting you. Specifically, your own blood or saliva reacting with the metal.
Think of it like a tiny battery on your tongue. The metal and your saliva create an electric current. This jolt zaps a chemical reaction, releasing aldehydes and ketones. Those are the weird flavors your brain interprets as “metal.”