" I read in a "high-class" review of Miss Rebecca West's book on St. Augustine, the astounding statement that the Catholic Church regards sex as having the nature of sin. How marriage can be a sacrament if sex is a sin, or why it is the Catholics who are in favour of birth and their foes in favour of birth-control, I will leave to the critic to worry out for himself. (chapter 4) "
― G.K. Chesterton , Saint Thomas Aquinas