More behavior-wise, but anyone who already overeats. Metabolism slows with age, and hunger usually won't.

In addition to bigger bodies needing more calories, it's likely you've stretched your stomach AND conditioned your brain to want more. I've done the same thing.

6'2", ~433 pounds
56 inch jeans, 5 XL shirts

Measure each contestants waists, give them shorts 2 or 4 inches too small. Stuff them until the buttons pop.
For an easy contest, sewn on buttons.
For hard, riveted jean buttons.

I also grow muscle fairly easy, but I guess I just grow fat easier. Maybe potatoes might do something for you?

I know I probably couldn't stop, so I just go for MORE. Double what a thin person couldn't finish. A little extra on that. Another helping. Some more after, when no one's looking.

Eat, Mrs. Goldfarb, Eat

Some things must be improved and maintained, like walking and stamina.
Others, like bending over to tie your shoes is something that goes and can't get back.

If I'm honest with myself, I need to purge all my 3xls and most of my 4xls.
I probably won't though.

If I really chowed down, I could realistically reach 450 by years end. Only about 14 pounds away, I estimate.