Quote from : Gods Just Want To Have Fun Book

Curious about these new entities, the elementals asked why the gods were in the shape they were. "We are bipedal," Erebus said. "We wish to be distinguished from the animals." "What are animals?" an elemental asked. "We're not sure yet, but they will have more than two legs. Unless we give them less than two... or maybe not. Anyway, it's just a concept we're playing with at the moment.