"Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge." (Hebrews 13:4)
Ever since the divine union of Adam and Eve, the institution of marriage has been between a man and woman. However, the "bed" has often been defiled, with all kinds of sexual perversions. Homosexual behavior is often mentioned in the Bible, and always explicitly condemned, even being called an "abomination" by the Lord (Leviticus 18:22). Adultery, fornication, prostitution, incest, bestiality, and all forms of sexual practice outside of heterosexual marriage relations are also condemned. Indeed, "God hath made man upright; but they have sought out many inventions" (Ecclesiastes 7:29).
Yes, but times have changed, we are told. The so-called "gay" lifestyle is now a normal option, they say, and even "same-sex" marriages are acceptable. Premarital sex, as well as adultery, are very common today, all over the world, often even impacting Christian homes and churches. Indeed, the world has changed!
But God has not changed, and His commandments and purposes have not changed. "For I am the LORD, I change not" (Malachi 3:6), He says. In the last book of the Bible, the glorified Christ said that "the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death" (Revelation 21:8).
The Greek word for "whoremongers," incidentally, includes anyone who practices or promotes illicit sex of any kind and the Bible says that "whoremongers and adulterers God will judge." However, God will forgive and purge away any of these sins when they are repudiated and Christ is accepted as Savior. HMM