They do. Working from home and working from office can easily make 3-500 calories of difference. Walking, calling, standing up, more energy expended in general.

They do. Working from home and working from office can easily make 3-500 calories of difference. Walking, calling, standing up, more energy expended in general. But also calories from modern food add up quickly. Say two men weighing 200 pounds, same activity levels. If man A eats "at maintenance" and man B eats at maintenance + small fries + small cookie + non-diet soda + apple, at the end of the day man A and B may not feel any difference in terms of "fullness" and "hunger", but man B is easily eating 800+ kcal a day than man A. Over months, I expect man B to get north of 20 pounds on man A. But I can see man B say to A, "I am not eating much more than you, just a little cookie here and there".