12k cal? Do you realize how much true food that is. Perfect example of throwing out a number but not taking the real time to see how much that really is. If you watch that program about the obese people, one of them eats about 15k a day and the 15k was a large table LOADED I mean loaded with crappy fattening food. No pro eats 12k a day period, at least not for any period of time. That amount of calories for any period of time would make anyone fat no matter how active you were or how much muscle you had.
If you ate 6 meals a day, ate a fully loaded Double Whopper with cheese, an extra large Fry, and a 24oz regular mountain dew with no ice, for all 6 meals, you would still be about 1200 calories short.