I'm starting to realize that there are physical craving based binges - that may be brought on by eating too many sweet potatoes (or whatever "safe" carb source), or even a misplaced "cheat food" on a day where my body isn't in optimum form, and it just wants moremoremore to compensate for the fact that I didn't sleep enough, I drank too much coffee, I didn't exercise like I usually do; whatever. These can also be brought on simply by the fact of eating too many carbs and then feeling withdrawl symptoms (see below.)
And there are emotional binges - that may be brought on by stress, problems in personal relationships, loneliness, hopelessness about my career situation, whatever the current example may be. These are infinitely more detrimental, as they seek escapism rather than just satisfaction of an urge.
It's usually an episode of a couple of the latter binges that lead to reintroduction of the physical dependency on sugar, that will spark a few of the former style of binges.
There seems to consistently be a turning point, at which, I realize I'm just seeking to binge for the sake of fulfilling the physical need, rather than escaping emotionally. This is the point at which I can regain control, because the physical symptoms seem trite in comparison to the visceral need of an escapist based binge.
I imagine you'd see this dichotomy of motivations in any user of addictive drugs. I've certainly been there myself, for the exact same reasons.