When I get focused on something or when I'm really hyper and distracted I can easily go a day before I realize how hungry I am... it's actually kind of like you described, I think to myself that I'm hungry and then I forget about it and don't eat for hours. And when my thoughts are racing through my head sometimes eating a meal turns into something else I get bored with and walk away from, I think "Oh! I need to do this really quickly before I eat!" and the next thing I know it's been 8 hours since I got my food ready.