Why so many smokers relapse after having been quit for many months

This is an except from my book, "How to Win at Quitting Smoking": 

If you wanted to drop weight, you need to be willing to change your food intake and increase your physical activity. This takes a commitment, making a Plan and taking action. Slowly over time the pounds come off.

If after six months you went to a birthday party where your favorite chocolate fudge cake was being served and this

"Calling it Quits" on Frankly Speaking About Cancer

It was like being in the dark ages the first time I had cancer when it came to emotional support-there was none. People I knew asked me to not say the "C" word around them, no one seemed to understand the physical, emotional and financial devastation I was going through with being diagnosed with a life threatening disease at age 32.

When I had a recurrence in 2010, I knew that emotional support