Chocolate is my aphrodisiac, I could not be hungry at all, have a piece of choco and get cravings for any food.
As for your apple, it's about 95% carbohydrates and carbs and has no protein to make you feel full. You are triggering the stomach acid which makes you crave more food? I can understand why it would be making you hungry. If you had something like cheese or gross peanut butter with it, you should have the fulled up effect.
Funny that diet coke (artifical sweeter) is said to have the same food craving effect and it's more bad for you than regular coke, lol I can understand the poor people trying out diets.
They say it's best to eat more regularly (4-5 meals a day, making sure you get a good breakfast), smaller portions, rather than silly diets or staving yourself.
Great post man! I agree.