It's bad not to act civil when in a relationship.
Stan is at a park with his wife, and his wife keeps trying to feed the pigeons human food.
Stan wants his wife to stop feeding the pigeons.
Stan tells his wife in his indoor voice that she might kill the pigeons by feeding it human food.
Stan raises his voice and asks his wife how many times he has to tell her to not feed the pigeons.
Stan's wife believes what Stan is saying and stops feeding the pigeons.
Stan's wife is embarrassed and feels like an idiot now.