1 Corinthians 5:1

It is reported commonly that there is fornication among you, and such fornication as is not so much as named among the Gentiles, that one should have his father's wife (KJV)

Then: Paul and no one else wants to talk about the abhorrently shameful behavior of incest. Paul is disgusted. Paul's disgust turns into an "in-your-face" letter. Corinthians were the "free sexers" of the Roman world, but this? Not even the Gentiles could abide it. How could those who were supposedly Christian approve it? Wright (p. 56) explains the Corinthians considered themselves to be beyond the ordinary world where standards of good/evil or right/wrong prevailed. They could do anything they wanted. They didn't understand the "freedom" in Christ.

Now: Attitudes of free sexers visibly dominate today's Western world. The Christian world view has been stamped out; its holders are derided and scorned. Many are so infested that they cannot recognize the line between what's moral and immoral. Idolatry, extortion, fornication, covetousness, etc. are justifed as being right for an individual. PC punditry buys the conventions that these actions and others are not really against God's will. And if they are, through God's mercy and grace, they will be forgiven. Everything's cool and covered by love. There's nothing to worry about.