It could be, but when I explained that a morbidly obese person will still have a higher BMR than me (as a comparison, my BMR alone is ~1200 calories), meaning that the obese will have to EAT at least those calories to keep the weight on/add some more, the friend denied that, coming with an example: The obese could eat as much as one banana in a day; it will still get stored, because of the lack of physical exercise.