Is premarital sex a sin ?

[mario]

Doing some research, need help!. Where exactly does it say in the Bible that Premarital sex is a sin?.  If you are quoting from the Bible please provide references, Also please tell me how you interpreted the passages referring to Premarital sex, better yet how does the Roman Catholic church interpret these passages.  If treatment of this subject is not present in the Bible, please let me know how the Roman Catholic church came about treating this particular act has a sin?.  Please do not provide any personal opinions ( such has degradation of culture, Morality, body is a sacred place  that sort of thing) if you do not have any references to back them up.  Also, do not point out  to  passages dealing with prostitution and adultery to prove your point, these are two different topics that should be discussed separately.  Thank you.

[Seeker]

From my understanding, anytime the Bible mentions fornication with regard to a sexual union (and not idolatry), it is referring to sex between a man and woman who are not married.  This would include premarital sex.  Prostitution is fornication with someone who gets paid, and adultery is sex with a married person who is not your spouse.  In this passage from St. Paul's Letter to the Galations, fornication is listed separately from adultery and is sometimes translated as "sexual immorality" or "sexual sin."

Gal 5:18  But if you are led by the Spirit, you are not under law.
Gal 5:19  Now the works of the flesh are clearly revealed, which are: adultery, fornication, uncleanness, lustfulness,
Gal 5:20  idolatry, sorcery, hatreds, fightings, jealousies, angers, rivalries, divisions, heresies,
Gal 5:21  envyings, murders, drunkennesses, revelings, and things like these; of which I tell you before, as I also said before, that they who do such things shall not inherit the kingdom of God.
Gal 5:22  But the fruit of the Spirit is: love, joy, peace, long-suffering, kindness, goodness, faith,
Gal 5:23  meekness, self-control; against such things there is no law.
Gal 5:24  But those belonging to Christ have crucified the flesh with its passions and lusts.
Gal 5:25  If we live in the Spirit, let us also walk in the Spirit.
Gal 5:26  Let us not become glory-seeking, provoking one another, envying one another.