I don't even think they know what hunger pains are. They are probably just not feeling their stomach is full to capacity. I am a normal sized human, sometimes I don't eat at all because I am busy and just don't have time for food. Then when I go home I am too lazy to eat so I just have a few glasses of wine and go to bed. I wake up the next morning and I'm still not starving. OMG, magic, but then I grab some salami or cheese or whatever is in the mystery take out box and eat it on the way to work so when I am really hungry later in the day I don't binge on Burger King which is the closest food for miles.