Homosexuality is the expression of man's sinfulness

The 1948 first edition of Sexual Behavior in the Human Male, the first of the two Kinsey reports. (Photo credit: Wikipedia)
For this reason God gave them over to degrading passions; for their women exchanged the natural function for that which is unnatural, and in the same way also the men abandoned the natural function of the woman and burned in their desire toward one another, men with men committing indecent acts and receiving in their own persons the due penalty of their error. (1:26–27)

For this reason, Paul declares-that is, because of man’s rejecting the true God for false gods of his own making, for worshiping the creature rather than the Creator-God gave them over to degrading passions. For the second time (see v. 24) the apostle mentions God’s abandonment of sinful mankind. He abandoned them not only to idolatry, the ultimate sexual expression of man’s spiritual degeneracy, but also to degrading passions, which he identifies in these two verses as homosexuality, the ultimate expression of man’s moral degeneracy.