Instead of using a single conjunction in a lengthy statements, polysyndeton uses several in succession for a dramatic effect. This one is definitely for authors looking to add a bit of artistic flair to their writing, or who are hoping to portray a particular (usually naïve) sort of voice. Example: 'Luster came away from the flower tree and we went along the fence and they stopped and we stopped and I looked through the fence while Luster was hunting in the grass.' — The Sound and the Fury by William Faulkner