well, the basis on my conclusion/ theory that they dont FEEL stress is that they are not wired to feel.. they are wired to respond.. which is different..

a stone is conscious too, but im sure the lapping of seas on them and their erosion also causes no feeling of pain.

regards breatharianism.. it is not pseudo science, it is beyond science.. science is just starting to understand how this can be possible.. i have met and know several breatharians.. it is really not a miracle when you understand prana and even some modern day physics.. but it is not for everyone and you have to breath in the right way to be able to do it ...