They have an expiry, so good things don't really last; no point preserving some. You only live once (YOLO), grab every thing worth grabbing before you start regretting. It's better you finish it fast then letting it slowly rot its way to the trash bin.
Over consume, and you get diabetics, become obese and all other sorts of illnesses that come along. Nothing's good when you have too much of it. You either get sick of it and take what's good for granted, or you get indigestion trying to chew off a chunk out-sizing your mouth. Take what's good and good enough; ambitions only get you as far as your capabilities can handle.
It can only get sweeter when you start sharing, because two person is now tasting that sweetness, the utility is improved (if the whole piece reaches the peak of its desirability and LDMR sets in, or whatever). Solitude will only bring you so far. But share it only with those that appreciates it (not the chocolate, but the act) or share it with the ants and houseflies. Choose who you wanna share with.
No chocolate is actually sweet or it'll be called honey or caramel or sugar. You only taste the sweetness because you choose to allow what makes you feel good to overpower what makes you feel the opposite, but who are you fooling? There's definitely bitter in it. And without tasting the bitterness of pure cocoa, you'll never really appreciate the slightest sweetness in life.
We'll never know what's the sweetest chocolate because life always give us surprises by showing us new boundaries. Something you find to be sweetest will soon become just sweeter, and eventually a mere sweet. It's not easy being the best, difficult to stay there, and near impossible if you just stay the same without trying to better yourself. That piece of chocolate don't have the means to outdo itself, you have.
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Screw it, just eat that damn piece of chocolate! It doesn't matter what decision you make, you'll still end up being the unique you you are and are going to be!