Here is what I see....
The word says that your body is not your own... that a man should fulfill his duty to "his wife" .. not wives. .... Not stand in line while he picks which wife he wants that night.
I think this choice is about LUST... about having a Pornagraphic mind and self.
In first century Jewish culture multiple wives was rare, with the exception of levirite marriages. (but that was rare as well)
Levirite marriage was commanded in the Law. It did not matter if you were already married, if your brother dies childless, you had the duty to raise up children to him.
And BTW, there was no choosing who to be with tonight. You were REQUIRED by Jewish Oral Law to keep all of them satisfied; and if you had a job that was not overly physical and kept you at home the requirement was DAILY. **
IOW, if a guy had 3 wives and was a shop keeper or a baker or some such trade, he had to sexually satisfy EACH of them every day.
I think that any lust associated with it would burn out fairly quickly.
BTW, 1 Cor 7 is the ONLY place that says a woman should do that for her husband. There are more scriptures going the other way.
** Mishnah tractate Ketubim