It is important for you to know about heart in order to love each other. What we mean has a deeper meaning than is conveyed by the English word. It means to be loving, caring, sensitive.
Heart is the source of love.
God has an ideal within Him, just as we have an ideal we long for within our hearts. God's ideal can be realized through man. In order for us to realize G od's ideal, we were created masculine and feminine. Unless male and female beings come together and are united, there is no way for God to express His love ultimately. Unity is the measure of your love, and the source of joy in marriage.