mmm food

how is it that while i'm at home on the weekends, it'll be like 2pm before i realize i haven't had lunch and should probably eat something but when i'm at work I feel the urge to constantly snack literally all day? I never have real hunger pains (except when i first wake up) and I know small meals frequently are the way to go, but it just seems so weird that I can completely turn that urge off over the weekend. maybe i should go for a walk! lol