Yesterday I was feeling totally run down and in a bit of lousy mood. I couldn't figure out why until I realized around 4:30 in the afternoon that I hadn't had anything to drink all day - other than the milk that was mixed in my bowl of cereal in the morning and a 1/4 of a cup of milk with my lunch. The fridge was empty of all beverages at the time - other than the tiny amount of milk I finished off. And after I had lunch, I was distracted doing other things and never thought of getting a better drink of something.
I suppose being a white guy, it never occurred to me I could get water from the tap. (Yeah, it's that controversial topic again... it's a joke - come on, it's funny. Really.)
Dehydration is a pretty lousy feeling. On the plus side, I didn't have to use the bathroom for the whole day!