Hebrews 13:4 ESV
Let marriage be held in honor among all, and let the marriage bed
be undefiled, for God will judge the sexually immoral and adulterous.
Genesis 2:24 ESV
Therefore a man shall leave his father and his mother and
hold fast to his wife, and they shall become one flesh.
ONE flesh, not two, three, four, or five etc
Ephesians 5:25 ESV
Husbands, love your wives, as Christ loved the church and gave himself up for her,
Genesis 2:18 ESV
Then the Lord God said, “It is not good that the man
should be alone; I will make him a helper fit for him.”
God gave one man one woman, not multiples.
Ephesians 5:33 ESV
However, let each one of you love his wife as himself,
and let the wife see that she respects her husband.
Matthew 5:28 ESV
But I say to you that everyone who looks at a woman with lustful
intent has already committed adultery with her in his heart.
Romans 12:1-2 ESV
I appeal to you therefore, brothers, by the mercies of God, to present your bodies as a living sacrifice, holy and acceptable to God, which is your spiritual worship. Do not be conformed to this world, but be transformed by the renewal of your mind, that by testing you may discern what is the will of God, what is good and acceptable and perfect.
Matthew 19:6 ESV
So they are no longer two but one flesh. What therefore
God has joined together, let not man separate.
Again, ONE flesh.
1 Thessalonians 4:3 ESV
For this is the will of God, your sanctification:
that you abstain from sexual immorality;
Ephesians 5:1-33 ESV
Therefore be imitators of God, as beloved children. And walk in love, as Christ loved us and gave himself up for us, a fragrant offering and sacrifice to God. But sexual immorality and all impurity or covetousness must not even be named among you, as is proper among saints. Let there be no filthiness nor foolish talk nor crude joking, which are out of place, but instead let there be thanksgiving. For you may be sure of this, that everyone who is sexually immoral or impure, or who is covetous (that is, an idolater), has no inheritance in the kingdom of Christ and God.
Ecclesiastes 9:9 ESV
Enjoy life with the wife whom you love, all the days of your vain life that he has given you under the sun, because that is your portion in life and in your toil at which you toil under the sun.