IV. Offenses Against the Dignity of Marriage

From The Catechism of the Catholic Church

2391
Some today claim a “right to a trial marriage” where there is an
intention of getting married later. However firm the purpose of those who
engage in premature sexual relations may be, “the fact is that such
liaisons can scarcely ensure mutual sincerity and fidelity in a relationship
between a man and a woman, nor, especially, can they protect it from
inconstancy of desires or whim.”¹⁸³ Carnal union is morally
legitimate only when a definitive community of life between a man and woman has
been established. Human love does not tolerate “trial marriages.” It
demands a total and definitive gift of persons to one another.¹⁸⁴

PART THREE: LIFE IN CHRIST

SECTION TWO THE TEN COMMANDMENTS
- CHAPTER TWO YOU SHALL LOVE YOUR NEIGHBOR AS YOURSELF
  - Article 6 THE SIXTH COMMANDMENT
    - IV. Offenses Against the Dignity of Marriage

From The Catechism of the Catholic Church – rosary.team