Feeling Thirsty

A husband and wife are sitting on the couch. After a long day at work, they are both just resting and relaxing as they watch a tv show. Husband: "I am feeling thirsty. Can you please get me some water?" Wife: "Shall I also get you some pizza as well?" Husband: "Oh wow! That‘d be great, my mouth is already watering." Wife: "Good, that means you don't need the water anymore then."