It's just breakfast I have a problem with and not other meals really. I will get light headed and cranky if I skip lunch or dinner but it doesn't result in sickness or issues with eating later on. Not sure what causes it. I don't eat that much sugar and I usually keep my carbs pretty low.
To be honest I find it more strange that not eating when your body is expecting it wouldn't cause a physical reaction for some people. Your body naturally wants to hold on to as much fat as possible and it is designed with safe guards to keep you from tapping into its "savings." If it didn't our species would not have survived during hard times.