The Bible says that God has appointed the Lord Jesus Christ to judge the world, but there is one sin that is exempted: the sin of sexual immorality.
“Marriage is honourable among all, and the bed undefiled; but fornicators and adulterers God will judge.” (Heb 13:4)
There are many overt and covert sins, some very despicable. Jesus will charge those who commit such sins and pass sentence as He deems fit. But why would God exclude the sin of sexual immorality from the list of sins to be judged by the Lord Jesus Christ? Two man reasons.
Deformation of the man God formed. “Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body” (1 Cor 6:18). The evidence is in the flesh and it distorts the man God created.
Ungodly sexual indulgence is a direct challenge to the integrity of God as the Creator of all things visible and invisible. God has delegated the replenishment of the earth to mankind with strict instructions on how it is to be done.
Frivolous indulgence in sexual escapades kindles the wrath of God to such a high degree that He has decided to handle the matter Himself.
Sexual immorality creates filthiness in the spirit, soul and body of those indulging in it. Filthiness is one of the reasons for ineligibility to participate in the rapture of the Ekklesia.