Haha, maybe I eat more chocolate than you :D Maybe you should exchange some of the chocolate for carrots, and see if you get a paradoxical reaction ^_

I know what you mean, though - my ability to gain or shred weight have changed wildly through time. I have been on the full journey being a veritable stick man (50-60 kg) in my 20's, until after graduate school where I started balooning until finally coming dangerously close to 90 kilos a couple of years ago, which prompted me to embark on a regime of exercise and change of diet that shaved almost 20 kilos off of me, which is where I am today.