6. On the evening before Holy Communion, we should not behave as if it is just another day. …
7. It has always been Christian tradition that a man and wife abstain from sexual relations on the evening before Holy Communion.
This was even the case in Old Testament times before important events. The reason we observe this important tradition is because marriage is an IMAGE of the love of the bridegroom (Christ) for the church, and therefore, of how we should love God. An image is inferior to the prototype, so we abstain from sexual relations, which are inferior to our love for God. …