The love between husband and wife is beneficial to health and longevity, and the necessity of love is generally speaking, the husband and wife who have lived together for the longest time in their lives and are most influenced by it. In the book "Common Growth in the Family" written by Li Lankuai, there is such a sentence: "Marriage is more important and more vital than career. Usually, if people are happily married, they will be happier than single geniuses. " Therefore, loving couples are not only the foundation of a happy family, but also the source of physical and mental happiness in life.