I feel quite sorry for you who are only a piece of animal tissue that can walk around and talk.
It seems I was wrong about the animal tissue.
Moreover it is used for polychrome stains with animal tissue.
Others are made out of animal tissue, often from a pig.
They're not tuned to animal tissue in general any more!
But to Centaurians, animal tissue itself was the equivalent of gold.
Scientists have for the first time produced fossils of soft animal tissues in a laboratory.
It looks to me as if animal tissue was rather rare on their planet, to be valued so highly.
Shorter wavelengths than this can cause damage to animal tissue and so they are not used by any life, except us.
I can't quite bear the thought of it being real blood and animal tissue.