"Yeah... this whole world's full of ponies, but this weird part of my mind kinda wonders what would happen if pegasi went extinct or somethin'. Then ya got earth ponies like me that can haul heavy stuff and do hard labor, and then there's the egghead unicorns that write everything down! If any one of 'em gets gone..."

What a scary thought. As he learned about each of the three kinds of ponies, he was learning how important even wingless, hornless ones like him were.