I think it can be about breaking certain thinking habits, or associations with smoking (like drinking, or if you're stressed out- you should see the ashtrays outside of the Alcoholics Anonymous meetings) too.
Time away from smoking will lead you to get your sense of smell back.
And the smell of cigarettes isn't pleasant.
yeah that's one of the reasons how I got through it as well, just by trying to cut out habits like drinking and focusing on other things in life.
The smell is gross
Henry