I know what you mean.
Does the person on the register [[I find that increasingly rare, now that self-serve machines are becoming more in evidence) say to you "would you be interested in any of our special offers today...?"
In some ways, chocolate is more nutritious than an apple - just needs moderation.
A bar purchased and completely eaten mid-morning, after no breakfast [[ and maybe no lunch to follow) is perhaps better than absolutely nothing - but still a bad habit.
As is reaching for a bar and working through it, telling yourself you must have something, being so stressed.....