Does a bad smell trigger you to take a deep breath and notice it?

bad breath
okei asked:

Captain Haddock is going for a country walk with Tintin, and he takes a deep breath admiring the fresh air just when he happens to be passing in the vicinity of a rubbish tip which he then of course notices.

Is there a subconscious physiological response to bad smells which triggers you to take in a deep breath and notice it? I believe there might be…what do you think?

Bad breath Gone