WHAT DOES THE BIBLE SAY ABOUT SEXUAL IMMORALITY?

Where does sexual immorality come from?
Matthew 15:19
19 For out of the heart come evil thoughts, murder, adultery, sexual immorality, theft, false witness, slander.
Mark 7:21
21 For from within, out of the heart of man, come evil thoughts, sexual immorality, theft, murder, adultery,
What commands does God give when it comes to sexual immorality?
1 Corinthians 6:18
18 Flee from sexual immorality. Every other sin a person commits is outside the body, but the sexually immoral person sins against his own body.
Colossians 3:5
5 Put to death therefore what is earthly in you: sexual immorality, impurity, passion, evil desire, and covetousness, which is idolatry.
1 Thessalonians 4:3-5
3 For this is the will of God, your sanctification: that you abstain from sexual immorality; 4 that each one of you know how to control his own body in holiness and honor, 5 not in the passion of lust like the Gentiles who do not know God;
Where should we draw the line to "flee", "put to death" and "abstain" from sexual immorality?
Romans 13:13-14
13 Let us walk properly as in the daytime, not in orgies and drunkenness, not in sexual immorality and sensuality, not in quarreling and jealousy. 14 But put on the Lord Jesus Christ, and make no provision for the flesh, to gratify its desires.
1 Corinthians 6:20
20 for you were bought with a price. So glorify God in your body.
Ephesians 5:3
3 But sexual immorality and all impurity or covetousness must not even be named among you, as is proper among saints.
1 Timothy 5:1-2
1 Do not rebuke an older man but encourage him as you would a father, younger men as brothers, 2 older women as mothers, younger women as sisters, in all purity.
How should we respond to a Christian living in sexual immorality?
Galatians 6:1
1 Brothers, if anyone is caught in any transgression, you who are spiritual should restore him in a spirit of gentleness. Keep watch on yourself, lest you too be tempted.
Matthew 18:15-17
15 "If your brother sins against you, go and tell him his fault, between you and him alone. If he listens to you, you have gained your brother. 16 But if he does not listen, take one or two others along with you, that every charge may be established by the evidence of two or three witnesses. 17 If he refuses to listen to them, tell it to the church. And if he refuses to listen even to the church, let him be to you as a Gentile and a tax collector.
1 Corinthians 5:9-13
9 I wrote to you in my letter not to associate with sexually immoral people 10 not at all meaning the sexually immoral of this world, or the greedy and swindlers, or idolaters, since then you would need to go out of the world. 11 But now I am writing to you not to associate with anyone who bears the name of brother if he is guilty of sexual immorality or greed, or is an idolater, reviler, drunkard, or swindler not even to eat with such a one. 12 For what have I to do with judging outsiders? Is it not those inside the church whom you are to judge? 13 God judges those outside. "Purge the evil person from among you."
How should we respond to a non Christian living in sexual immorality?
1 Corinthians 5:9-10, 12-13
9 I wrote to you in my letter not to associate with sexually immoral people 10 not at all meaning the sexually immoral of this world, or the greedy and swindlers, or idolaters, since then you would need to go out of the world.
12 For what have I to do with judging outsiders? Is it not those inside the church whom you are to judge? 13 God judges those outside. "Purge the evil person from among you."