So, I've got a really nice hangover. I know that a lot of a hangover is dehydration, but there's a real puzzle in my brain. When I woke up, I drank a glass of water. Not a very big glass... maybe 12 ounces, tops. Anyway, twenty minutes later, all that water got pissed straight into the toilet. Someone who knows something about this please explain to me why our bodies piss away (literally) so much water when we're badly dehydrated.