Grog provydes farey-tale:
This iz ceremonyal headpeece of grate god-rodint Chemongus. Meny sun cycles ago (long before Grog) tribe was hungry and hunting party too stoopid to catch meety mammoth. Chemnongus skared mammoth off clif and towerd hunting party who lyed in wate with sharp pointy stiks. Tribe eat well that seeson and make giant replika of rodint head from leftover mammoth fur to alweys remember Chemongus. This is why modern elefunts skared of mise and rodints.