Just because you want to be fit doesn't mean you have to argue with your sweet tooth. It's not really sustainable to cut the goods of your good intentions. In all fairness, we were born consuming breast milk which has high sugar content. Actually, fat free candy can even be a damn good pre-workout supplement.
Parents understand the effects of candy. If you allow a child candy, you will see an amazing sugar rush. An ear-wide smile turning into uncontrollable vandalism and ending with a sluggish crash. Parents know that limiting sugar intake and eating regularly will kill the insulin spikes. But for training, don't we all wish we had the energy of someone younger?
The reason why I mentioned specifically fat free candy, is because fat itself will slow down the absorption and will be difficult to burn off.
My condolences if you live in a country where candy is only manufactured with kids in mind. If you can't get a hold of good candy, you can take a more serious approach with the healthier and fiber-rich option called rasins. Or perhaps you can get your fix from fresh baked white bread? If you are not a fan of that either, you might as well drink a sports drink containing Vitargo.
But can we also eat candy after training? After all, that's when most people recommend to consume fast carbs. The body will definitely absorb the sugar well and you will feel much better, but science does not show any improvement in protein synthesis(ref 1). But if you have another training session the same day, you should not hold back on nutrition in between the sessions. More importantly, if you want to perform well at work after the training session, make sure you feel good. If candy does the trick, and it's in line with your dental and anti-diabetic habits, then give it a try.
1.René Koopman , Milou Beelen , Trent Stellingwerff , Bart Pennings , Wim H. M. Saris , Arie K. Kies , Harm Kuipers , Luc J. C. van Loon. http://ajpendo.physiology.org/content/293/3/E833. Coingestion of carbohydrate with protein does not further augment postexercise muscle protein synthesis. (American Journal of Physiology - Endocrinology and Metabolism Published 1 September 2007 Vol. 293 no. 3, E833-E842 DOI: 10.1152/ajpendo.00135.2007)