Every disagreement or dispute doesn't need to be a blow out or argument. Even though you're a couple, you're two seperate individuals that have different personalities and understandings -which is okay and normal. So if someone forgot to empty the dishwasher or didn't pay a bill on time - no need to get overtly upset because it's not the end of the world. It's healthy to voice your frustrations or opinions in a calm manner but let it go afterwards. Every disagreement doesn't have to involve an intense battle.