I have never understood those couples who say they never fight. I can’t identify with it, and I also don’t think it’s very healthy. On the other end of the spectrum, fighting or arguing can be a relationship killer if not handled healthily. Arguing is healthy. When two different people come together with differences of opinion and baggage from being human, it’s inevitable for there to be a spat in the mix. What’s not healthy, is when it’s taken to extremes.