I mean, you can love 2 people as parents, multiple people as friends, and multiple people as your children...why not multiple people as lovers?

I like the idea of normalizing polyamory because it would put women at a sexual/romantic advantage, because men are much more likely to wish to have multiple romantic relationships at once.

Men (24%) are 4x more likely than women (6%) to be willing to have other romantic relationships outside their relationship, as long as it's less important than the primary, and more than 3x more likely (30% vs 9%) to be willing to have a 3rd romantic partner enter their relationship on equal terms.

https://www.psychologytoday.com/blog/strictly-casual/201404/whos-really-interested-in-alternate-relationships

This would give women more options since there'd be less men who are off-limits.