Sometimes Christians engage in promoting horribly immoral behavior, when they really should know better. The Apostle Paul criticized the church at Corinth for doing this two thousand years ago:
It is actually reported that there is sexual immorality among you, and of a kind that even pagans do not tolerate: A man is sleeping with his father’s wife. 2 And you are proud! Shouldn’t you rather have gone into mourning and have put out of your fellowship the man who has been doing this? (I Corinthians 5:1-2)
Paul Criticizes this church because they were rejoicing over a man who was having sex with his own stepmother! I certainly hope this was after his father died, but either way it was still sin. The church of Corinth should have known better. They probably thought this kind of behavior was OK because Paul had not specifically told them that this particular kind of relationship (man and his stepmother) was wrong. But Paul thinks they should have known better anyway, because the simple principles of sexual purity had been violated. They should have known that sex is sacred, something to be guarded, only to be shared with one life partner who is of the opposite sex, not a family member, until death do them part.
It is embarrassing and humiliating when Christians flaunt their sexuality in ungodly ways. Rather than save it in order to cherish with a godly spouse, they act like animals around others, demeaning themselves in the process. This is not what true love looks like. There are many Christians that act this way today. They may know better than to literally marry their mother-in-law, and yet they do other things that they should know better than too. They go to strip clubs and order lap dances from women who are married to/dating other men. They engage in humiliating talk of a sexual nature about their co-workers. Do they not know that this is wrong? This kind of behavior is normal for someone who is not a Christian, but Christians need to live by another set of rules. Calling yourself a Christian is serious business. The name of Christ is more than just another name: it is the name, and it means something.