Monster Musume no Iru Nichijou - Vol. 1 Ch. 5

[MangaDex]

 

[theBluedog66]

But well i mean... Its obvious who to marry...






Ms. Smith

 

[Ni-Ji-Gen]

They say marriage...but I don’t think polygamy would really be a problem if it’s between different species with different needs

 

[ThePantyGod]

Interspecies Marriage is fine but it's japan! So no polygamy

 

[A_Crappy_Connoisseurs]

Both the Luckiest and Unluckiest man alive.

 

[Dwander1219]

Ms. Smith single-handedly ending the battle but starting a civil war:

 

[curvedtree]

super cute, Lalatina Darkness reminds me of her

 

[dementati]

They say marriage...but I don’t think polygamy would really be a problem if it’s between different species with different needs

Aside from the fact that such a small portion of the population is polyamorous, another major reason why polygamy isn't and is unlikely to become legal is cause it's a legal nightmare. Divorces can already be extremely lengthy and messy affairs with just disagreements between two people, that would grow exponentially worse as you add more people to the mix. Not to mention all the other different legal benefits and responsibilites that come with marriage that'd need to be adapted to cases with more people as well as countermeasures to people who'd exploit the system to get unfair advantages. It'd become very very terrible, legally speaking.