>>281632715
You can objective explain why polygamy is bad very easily.
Also, it's funny how you skipped the second half of that post.
1. People who sleep around with multiple sexual partners get brain damage that ruins their ability to form relationships, both platonic and romantic.
2. Humans are social creatures and can only thrive with society.
3. Thus, people who practice polygamy damage society and are objectively bad.
Thus can be backed up with historical proof showing that every society that practiced died, crashed and burned. And modern day nations with polygamy are unstable hell holes in the middle east.

Here's a random picture from my yuri folder.