Thirsty

As I walked back to my office after grabbing a bottle of water from the kitchen, I passed a co-worker in the hall who, upon seeing me holding said bottle of water, asked "Are you thirsty?".  I replied "Yup", and we both continued on our way.  It's moments like this where a simple head nod, eyebrow raise, or fake smile as we passed in the hall would have been perfectly acceptable, if not preferable, as clearly he knew the answer before even asking the question.