John Calvin on Romans 1:26

26. God therefore gave them up, etc. After having introduced as it were an intervening clause, he returns to what he had before stated respecting the judgment of God: and he brings, as the first example, the dreadful crime of unnatural lust; and it hence appears that they not only abandoned themselves to beastly lusts, but became degraded beyond the beasts, since they reversed the whole order of nature. He then enumerates a long catalogue of vices which had existed in all ages, and then prevailed everywhere without any restraint.

It is not to the purpose to say, that every one was not laden with so great a mass of vices; for in arraigning the common baseness of men, it is proof enough if all to a man are constrained to acknowledge some faults. So then we must consider, that Paul here records those abominations which had been common in all ages, and were at that time especially prevalent everywhere; for it is marvelous how common then was that filthiness which even brute beasts abhor; and some of these vices were even popular. And he recites a catalogue of vices, in some of which the whole race of man were involved; for though all were not murderers, or thieves, or adulterers, yet there were none who were not found polluted by some vice or another. He calls those disgraceful passions, which are shameful even in the estimation of men, and redound to the dishonoring of God.