(Proverbs 5:15 KJV) Drink waters out of thine own cistern, and running waters out of thine own well.
This is a beautiful expression of the sexual relationship in marriage. This chapter in Proverbs would be banned by the same people that have trouble with the Song of Solomon. This is a call to fidelity and faithfulness. It is poetic but it calls out to us, in its context, to enjoy and be fulfilled by the sexual contact that God built into us as human beings.
God demonstrated great variety in His applications of the sexual relationship. It goes from the amoeba that just splits to reproduce to the human standard of totally knowing another distinct person. In between you have casual contact, king of the heard, mate for the season, mate for life and others arrangements that don’t come to mind. Out of this variety He has chosen that which fits creatures given the image of God.
So? You may not have the perfect marriage but God really wants you to be fulfilled in it. Don’t stray or start looking at the grass on the other side of the fence.