Is this possible? Yes, but of course not by eating conventional chocolate which includes sugar or artificial sweeteners.
Who adores the endorphin thrill given by chocolate without risking a gain in weight has to grab at 100 % bitter chocolate.
This requires a certain habituation, but turns to account: Chocolate contains valuable plant compounds like antioxidants and is very healthy if it is free from sugar or other sweeteners. Even though you may find it a little bitter ;-).
DDr. Heinrich, MD