I'm on the opinion of "You can eat how you like, if you move accordingly".
If you have healthy habits of excercising daily, you'd really have to eat like a PIG to keep yourself fat.
At least that's what I think, as I have never been fat I can't say for sure what it's like.
I knew someone that thought it was ok to heat badly as long as she was happy when she was doing it...I'm not sure that's the way it works though. 😆
Exercise has a lot to do with it I think but these days people are more sedentary than ever and food is so laden with the wrong things...not a good combination.