Traditionally, the consent of the other party is required. With animals, getting their verified consent may be an issue. However, if we are heading into a new Dark Ages, with heavy feudal overtones and a strong flavor of Might Makes Right, then I think the concept of consent will be waived. You can marry women who hate you — what does their opinion matter? And you can marry dogs and sheep — who will stop you?
I see no way they can deny polygamy using the same criteria the perverts use to justify gay marriage, there is no difference.
This is headed for legalizing incest and pedophilia in the long run. Nothing will be sacred, anything will go. Oh they will of course consider this radical scaremongering but we have been here before with the issue of gay marriage.
As a society and country we’re done it’s just a question of when it collapses upon it’s amoral, corrupt and bankrupt self. Sad...