Zebra and Baboon: A Watering Hole Battle

Zebra and Baboon argued over who should have the first drink at a watering hole. The pair gathered stones, placed them in a circle of stones and set sticks ablaze. But as you can imagine, this bickering went on and on until Zebra flared her nostrils and stamped her foot. They used their might and began to wrestle before other animals came scurrying over. Now that the fire is lit, I'm having a drink. Why should you get the first drink?