The Creator God directly devotes two of His ten great laws to protecting family relationships. In the fifth commandment, we see how important honoring parents is in maintaining a Christian family relationship. God gives the seventh commandment, "You shall not commit adultery," to protect the honor and sanctity of marriage. It is through marriage and the family that we learn how to conduct proper relationships, both with other people and with God. Since it is such an important institution to character development, God does not tolerate its defilement. Within marriage, sex is fully sanctioned by God, but otherwise, its practice causes great harm. In principle, this commandment covers all forms of illicit sex, including fornication, homosexuality, bestiality, and pedophilia.
Martin G. Collins
The Seventh Commandment