text: Your last sentence is an ugly personal attack, entirely uncivil. 
  
  He/she doesn't misunderstand it at all.
  
  You do.
  
  The unitive purpose of marriage serves the procreative and the procreative the unitive.  Both, together, serve God's enlarging Kingdom.
  
  The end goal of life is holiness, that is, closeness, unity and intimacy with God.
  
  The work following procreation demands the building up of certain holy virtues: a generosity of spirit, happy denial, a zillion acts of charity in family life, an increase of patience.
  
  Most Catholic marriages which occur post-menapausal occur with the couples already having been parents!  That means the virtues gained by being parents earlier can now re-serve the new unity of the second marriage.