What Does God Say About Fornication ?

The world says that sexual intercourse before/outside marriage (fornication) is OK - Jesus says it's EVIL.

21 For from within, out of the heart  of men, proceed evil thoughts, adulteries, fornications, murders,  
22 Thefts, covetousness, wickedness, deceit, lasciviousness, an evil eye, blasphemy, pride, foolishness:
23 All these evil things come from within, and defile the man. 
Mark 7: 21-23

9 I wrote unto you in an epistle not to company with fornicators: 
10 Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world. 
11 But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such an one no not to eat.
12 For what have I to do to judge them also that are without? do not ye judge them that are within? 
13 But them that are without God judgeth. Therefore put away from among yourselves that wicked person.
1 Corinthians 5:9-13
  
Christians MUST run away from fornication. The Bible says: Flee fornication. Every sin that a man doeth is without the body;  but he that committeth fornication sinneth against his own body.
1 Corinthians 6:18

 If a Christian 'couple' sleep together before marriage, getting married will NOT deal with the sin they committed before marriage. The only way to deal with it is to confess it as sin (preferably together) to Almighty God, and renounce it.

If a man and a woman commit fornication they also become 'one flesh'. Only God can break this ungodly soul tie. 

This may not be the most popular teaching but God is not interested in popularity or political correctness. He is interested in Christians walking in holiness and purity.