The affirmative side of this debate reasoned that the morals outlined in the Bible weren't applicable anymore since society had changed so much during the thousands of years since the Bible's authorship.
The negative side argued that the morals dictated to us through verse or illustrated to us by parable are no less valid in today's day and age than the fundamental rules outlined by the Ten Commandments - that are still applicable in the 21st century. Negative also pointed out several instances where polygamy is ordained by God in the Bible.
You're probably wondering HOW we got to arguing about the Bible from why people pay for sex...
It actually started with the affirmative stating that men's innate need to spread their seed to as many viable females as possible has been usurped by their capacity as high-functioning mammals to restrain themselves from doing just that - although they acknowledged that’s what men were made for.
The negative agreed that it is a biological function for men to spread seed just as it is for females to constantly be seeking the most successful male to continue her own legacy of creating the strongest, fastest, smartest offspring, etc, etc. The negative also pointed out that the affirmative's argument that we have the mental capacity to withhold from these behaviors is complete shit - because tens of thousands of years ago we were already the most highly developed brains on the planet and we were still exhibiting these behaviors that may now be considered immoral - because the biological drive on both sides existed loooong before we had the capacity to realize it was there and therefore it is much more firmly ingrained in our beings than our relatively new reasoning not to do what we were made more.
ALL this got us to the Bible because frankly, I think the affirmative was grasping at straws once they saw that they may have picked a fight they weren't prepared enough to win.
Then, that plan backfired because the affirmative is much less versed on the Bible than the nagative.
Poor start to the day for the affirmative... I'm just sayin'.