[Bratch]

So St. Paul was issuing a warning, rather than a prohibition.

^{24 Therefore God gave them up in the lusts of their hearts to impurity, to the dishonoring of their bodies among themselves,} 

^{25 because they exchanged the truth about God for a lie and worshiped and served the creature rather than the Creator, who is blessed forever! Amen.}

^{26 For this reason God gave them up to dishonorable passions. For their women exchanged natural relations for those that are contrary to nature;} 

^{27 and the men likewise gave up natural relations with women and were consumed with passion for one another, men committing shameless acts with men and receiving in themselves the due penalty for their error.}

^{28 And since they did not see fit to acknowledge God, God gave them up to a debased mind to do what ought not to be done.} 

^{29 They were filled with all manner of unrighteousness, evil, covetousness, malice. They are full of envy, murder, strife, deceit, maliciousness.}

^{They are gossips, 30 slanderers, haters of God, insolent, haughty, boastful, inventors of evil, disobedient to parents,} 

^{31 foolish, faithless, heartless, ruthless.} 

^{32 Though they know God's righteous decree that those who practice such things deserve to die, they not only do them but give approval to those who practice them.}

[Notthereyet]

“So St. Paul was issuing a warning, rather than a prohibition.”
___________________________

Paul didn’t need to issue a prohibition; it was already discussed in the Old Testament (early records/laws).

He wasn’t even giving a warning to anyone.

He was simply stating fact about consequences.