Many people can agree that communication is the foundation of a solid and healthy relationship and that it needs to be worked on daily. However, misunderstandings and words that hurt the partner are expressed in an unhealthy way and are the reason that undermines many relationships. And the thing that can lead to a premature ending of a relationship is certainly constant criticism. But why is criticism so harmful and how can we let our partner know that his behavior bothers us in a healthy and respectful way?