Was there ever municipal lead water pipes in your area? If so there might be old lead scale in the galvanized pipe

Invisible Cows sign is on the road to access Mauna Loa observatory on Hawaii

Yes. It’s a different avatar or character as me in different dreams. Sometimes there will be another person from life also in the dream as themselves, sometimes a person from life will be there in a different avatar then what they look like in life.

Both! And only very occasionally does the 3rd person view look anything like me