According to Jewish thought, a husband and wife were originally one soul before birth, split into two halves when the older of the two was conceived. By reuniting in marriage, their bond represents the reunion of a single entity, of one soul. This oneness, the central goal of Jewish marriage is not easy to achieve. By marriageable age, each individual has a unique history, experience, likes and dislikes. Fortunately, marriage itself provides the tools for reconciling these divergent experiences.
Sexual intimacy is perhaps one of the most powerful routes towards intimacy in marriage.
All of the wonderful feelings in a marriage culminate in this aspect of the relationship between husband and wife. Since G-d gave intimacy such extraordinary power, He also gave us a medium through which to achieve it. In former times, Jewish marriages were to be envied. Jewish families not only knew about mikvah and family purity, they risked their lives to practice them. To this day, family purity is enjoyed by a significant percentage of observant Jews.