Here's another reason, and it's the Catholic angle: Everything we do ought to mirror what Jesus does for us in his words and deeds. He spoke words of love that changed hearts, and healed lives; he laid his life down for his friends. That could be a very powerful definition of what your marriage should be.
Jesus is the Bridegroom and we are his Bride. His words preceded action.
Catholic life is one that is filled with words and deeds. The Bible is the greatest love letter ever written to the heart of humanity, and the Sacraments are the greatest graces that, in our day, make the Word tangibly real indeed. At Mass, in the Liturgy of the Eucharist, we hear our story recounted, the words of faith and love. In the second part of Mass, we experience the Liturgy of the Eucharist. The Person of Christ becomes present to us in Communion.
The words we say and pray and hear find their truth in the Presence of Love.
Let your love for your wife, or your wife-to-be, be the words of a bridegroom. Let your bride know your memories of her, your delight in her company and in your own couple's story, and, finally, your renewed pledge of fidelity to her.
Communion starts with words of love, and ends with love that need no words.
Be her Valentine.