Ugg, Guh, and Erg are three cavemen. Ugg is the biggest, Guh is second biggest, and Erg is a twerp. They constantly fight foe their tribe against another tribe's three warriors, who are of similar size as them. One day, Elder Grug notices that there's no consistency whatsoever to who wins or loses. His warriors explain that since everybody's about as good as each other and has roughly the same size bonk stick, the fights are a bit random. Elder Grug points out that Ugg's bonk stick is like one and a half times the size of Erg's. Ugg explains that every caveman fights against their enemy who's the same size. Elder Grug tells his warriors to knock this off, and have Erg take on the biggest enemy, Guh to take on the smallest, and Ugg to take on the second biggest. Erg protests but he gets bonked and shuts up.