Bagels vs Water

I went to Panera Bread this morning to grab some bagels for breakfast.  As we were eating, my son told me that his feet hurt.  It sounded like he may be a little bit dehydrated so we told him that he needed to drink some water.  His response, "my feet aren't telling me they need water.  They are telling me I need to eat a bagel one time."  Okay?