The ancient Romans, Jews, and Chinese were all saliva enthusiasts, though as far as I can tell you couldn’t use your own. Treatments would specify the type of spittle required: woman spittle, newborn man-child spittle, even Imperial Saliva, Roman emperors apparently contributing to a community spittoon for the welfare of the people. Most physicians delivered the substance by eyedropper, or prescribed it as a sort of tincture, although in Li Shih-chen’s day, for cases of “nightmare due to attack by devils,” the unfortunate sufferer was treated by “quietly spitting into the face.”