You get used to eating "healthfully" and even when you make a concession for something not so healthy...or lets just call it something not so "clean" your mind still goes to the thought of what you had was bad. So it was not the best of choices, but it wasn't an entire sleeve of cookies either. In pizza at least there is some nutritional value....and the m&ms well one handful isn't going to make or break you so long as you got right back into line.
I read somewhere here that food is nutrition, not emotion. That could not be more true, however, I still confuse the two!!!
I think a part of it is that maybe the day wasn't well planned out in a way that had you with a glut of calories at day's end....which your mind took advantage of and started thinking HEY...I CAN eat this or that or this or that. I don't have to eat broiled chicken with salad tonight. The first time I was in that situation since July was a Sunday that went bad. I found myself at 7 p.m. having had just a coffee with skim milk because I took a long nap to avoid the nonsense. I'd been craving a burrito from Chipotle, so I took advantage of not having to cook for the family and drove myself there. I skimmed some calories off of it by not having the sour cream, cheese or guacamole, but still it was a caloric nigthmare....and I lost 2 pounds that week
The last time I did it was with mac and cheese. Now, I had gone for a period after that when I wasn't hungry at all and had absolutely no cravings and could care less if I ate or not. But that mac & cheese crave returns like a mad dog that has to be kept in a cage!
When you can fit a not so good for you crave into your calorie budget....it can be a good thing.