Gaining

Fast food diet

Ok, minus the obvious health risks to eating this way, how much weight could a person technically gain if they decided to eat more junk food and fast food than anything else? Like instead of water, sodas. Eat more candy. Or try and have at least 2 meals a day be fast food. Would it even work? I know some people can't handle that kind of food. I know some can.

Any thoughts?
13 years