God intended that sex be enjoyed between a husband and wife in marriage, so couples who have sex outside of marriage would be considered a sin. Even if you live together and plan to get married, having sex before marriage is still a sin and is not pleasing to God. May marriage be honest among all, and may the marriage bed be intact, because God will judge those who are sexually immoral and adulterous. Not having sex before marriage: When asked what the Bible says about sex, most people will have this answer.
However, when asked to provide exactly where this rule appears in the Bible, many Christians' answer is much less certain. When a person sleeps in the same bed as a person who is not their spouse, they are also open to many temptations. All quotes from the Scriptures, unless otherwise indicated, are taken from The Holy Bible, the standard version in English. Simply having sex or living together does not fulfill the functions of the biblical model of marriage.
Visit the Bible online to search for words if you don't know the specific passage you're looking for.