Exactly. The zero-pont of scent perception is not fixed. One never smells one's own halitosis... If one is lucky they have a good friend that will alert them. I

Exactly. The zero-pont of scent perception is not fixed. One never smells one's own halitosis... If one is lucky they have a good friend that will alert them. I would guess that every perception of how the "past" smells is biased by by zero-point of ones own ... biochemical cloak ... ]?]