All I want to do is Eat!

I don’t understand why some days I feel like I could eat 6 meals and other days I’m not hungry at all.  I find this very interesting, because it doesn’t seem to have anything to do with how much I exercise.  Take yesterday for example I wasn’t hungry at all, and today I could eat all day long.  I have had 4 meals already and it is only 7:00 P.M.  I don’t understand my metabolism.  I’m hoping I get to a point where I wont have to eat 5 meals in one day!