I am extremely grateful not to have tonsil stones. Follow that link to the New York Times story and be thrilled that you don't have these foul-smelling things growing in (and occasionally popping out of) your tonsils, either:
Formally known as tonsilloliths, the stones consist of mucus, dead cells and other debris that collect in the deep pockets of the tonsils and gradually condense into small, light-colored globs. Bacteria feed on this accumulated matter, giving rise to the odor. Most commonly, the stones are no bigger than a pencil eraser, although doctors have reported individual cases of patients with stones more than an inch wide.
I know, I know, it's wonderful how our bodies can surprise us. Or frighten us. I wonder what South Park will do with this information.