I emphasize again that, more typically in the Roman era, sex with prostitutes and courtesans, and with young boys as well, was not only tolerated but even affirmed
as a hedge against adultery—specifically, sex with another man’s wife or with a freeborn virgin. It is noteworthy, therefore, that Paul, with some other ancient Jewish voices, condemns a far wider spectrum of sexual activities, labeling them as
porneias, and that he posits marital sex as
a hedge against these various temptations to extramarital sex of any kind. In short, Paul reflects a broadening of prohibited sex well beyond adultery. This alone represented a major shift in comparison to the attitudes of the larger Roman world.—
Destroyer of the gods: Early Christian Distinctiveness in the Roman World, page 165 (emphasis original)
<idle musing>
Again, the attempts to rewrite biblical morality leave me unconvinced, largely because of this background. To argue that we know more about sexuality than they did is a bit hard to take when you actually dig into the Greco-Roman history. By the way, William Loader, who probably knows more about ancient sexuality than anyone alive, agrees that the Bible is unequivocally against any kind of sex outside of heterosexual monogamous marriage. But he just says that the Bible is wrong.
He's an honest man. You can't have it both ways. Either you agree that scripture is correct or you agree with Loader that scripture is wrong. You can't claim scripture is correct by reinterpreting it on this issue.
</idle musing>