This is the famous passage from Romans against homosexuality:
“For this reason God gave them up to degrading passions. Their women exchanged natural intercourse for unnatural, and in the same way also the men, giving up natural intercourse with women, were consumed with passion for one another. Men committed shameless acts with men and received in their own persons the due penalty for their error.” (NRSV)
Sarah Ruden's fabulous book Paul Among the People explains homosexuality as practiced in the Roman world of his time.
The concept did not change over the next six hundred years. Paul's
Roman audience knew what justice was, if only through missing it.
They would have been surprised to hear that justice applied to
homosexuality, of all things. But many of them-slaves, freedmen, the
poor, the young-would have understood in the next instant. Christ,
the only Son of God, gave his body to save mankind. What greater
contrast could there be to the tradition of using a weaker body for
selfish pleasure or a power trip? Among Christians, there would have
been no quibbling about what to do: no one could have imagined
homosexuality's being different than it was; it would have to go. And
tolerance for it did disappear from the church (71).