> Your body will inform you when you're thirsty.

My body doesn't. That's what I'm telling you. I feel like shit, I don't feel thirsty; as soon as I drink something I suddenly realize I'm thirsty, drink a bunch, and immediately feel better.

We're not talking about life-threatening dehydration. We're talking about thirsty enough to feel bad, but my body isn't sending "drink something" signals.