I used to have quite the issue with overeating, especially since I had no idea how much calories were in certain foods.
I know what you mean. Certain foods can be addicting too. and that is the compulsive consumption of a high fat and high sugar food or foods which activate a reward center in the brain
Yeah, they're so much easier to access than before since sweet foods are thought of by the body as occasional treats.
Compulsive over eaters depend too much on food to comfort themselves when they are stressed or depressed. 
Yeah, it seems to occasionally be linked to things like depression as well.
The 12 step program helps over eaters also, not just for alcoholics or drug addicts.