system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Odd unanswered question about Metal rubbing metal.

Whenever two metal utensils rub together (forks, knives, spoons) or on a metal pan/dish, and I taste it, I taste this really strong metallic/weird thing. It's extremely unpleasant for me to taste and nobody else I know has the same problem.

I asked this question 5 months ago and nobody answered it.
gpt
The surface of almost all metals is attacked by the oxygen in the air to form a surface layer of metal oxide. Some types of oxides are much more visible than others such as rust in iron or tarnish in silver. Only a few metals such as gold and platinum do not normally react with oxygen.

The metal oxide layer on the surface prevents direct contact with the actual metal underneath. When you rub two metal things together, you temporary break apart the oxide layer. When you taste it before the oxide forms again, you are directly tasting the metal rather than the oxide which results in a strong metallic taste!