She watched his face when she asked him to spit in the cauldron. "There is a protein called Histatin in the saliva... it has healing properties, Dog saliva is the best, but I don't have any... yours will do..." She said and then with her hand took some of the unction and rubbed it on his arm. "Master is the correct way to address you. You are barely 18, maybe still 17... Why grow up so fast?" She said. "I am merely extending you respect."