Color perception
Arnold Trachtenberg (Sat, 24 Jan 2004 09:07:09 PST)

Jim:

I would take it a bit further. All of out senses are programmed to
compare different degrees of light, temperature, smell and touch. You
might think or sense a bad smell until something comes along even worse
smelling. It is a well know fact that sense of smell can adjust (
accommodate) to an odor and after a while the scent is less or barely
perceptible.

Arnold