Like I said, it's just a guess from my experience. It's a complicated subject because people can get "hungry" for different reasons. For me it could very well be that simply getting up to walk a 4-mile circuit around the neighborhood gives me enough of a goal and enjoyment that I feel less of a need to reach for food as entertainment, including the time following the walk.

What gives me an appetite is weight lifting. I honestly don't get how people can't be hungry after lifting heavy. Could be psychological for me because I am also intent on building muscle, but still. My hunger after lifting is more visceral than my usual "gotta eat" feeling.