To a dog there is no such thing as a good smell or a bad smell.  To us there are no "good" colors or "bad" colors.  Sure we may have an opinion on what a "bad" color is but inherently there is no negative color but to what we assign to them socially.  There are only mild smells and intense smells, interesting smells and disinteresting smells. They "color" a dog's world with a depth and breadth that we can only experience on a surface level. I often envy a dog's olfactory abilities for the sheer fact that they get to experience the world on a whole conceptually different level.  Driving with the window down nose in the air must be like an aromatic buffet of a movie.  An ordered but abstract fragrant world of subtle instances of pungent and savorous effluence.   In short it is a flimsy justification for my panty sniffing fetish... >.>;;;