All long-term relationships go through a variety of phases. There is the initial dating and courtship and infatuation period. If the relationship continues, it settles into a more stable time of building a history as a couple. If children enter the picture, that is a new phase. Later, there is another phase of being together as a mature couple with the wisdom of experience.We all know that it is possible to keep passion, romance, excitement and sexual intensity alive through the years, but we al.