For me it is the fact that our blood contains iron. I earlier used to believe the word stood for some ‘organic element’ since I couldn’t accept we had metal flowing through our supposed carbon-based bodies, till I realized that is where the taste and smell of blood comes from.
Maybe yo. Maybe you got extra taste receptors all up in your cavities, like how some people can see super colors.
Most of life on the planet can see ultraviolet but we can’t. Dogs and cats can. Cats can see our stripes, even tho we can’t.