It is rude not to pick up after your dog.
Mary just got a new dog from her parents for her birthday.
Mary wants to take her dog for a walk.
Mary puts on her glove and diligently picks up after her dog when it poops on the neighbor's lawn.
Mary lets her dog poop on the neighbor's lawn and didn't bring garbage bags with her.
"Mary's parents open their door and says ""Great job, Mary!"" and Mary smiles back at them."
Mary's parents scold her and threaten to take the dog away if she doesn't start picking up after it.