[jimt]

I have no problem with two human beings joining in a union. Makes no difference to me if they're a man and woman, two men or two women.

If that's so, why should it be restricted to two ? And why only human beings ?

[MirrorField]

I have no problem with two human beings joining in a union. Makes no difference to me if they're a man and woman, two men or two women.

If that's so, why should it be restricted to two ? And why only human beings ?

For first, IMNSHO not if participants are willing. As they say, bigamy is it's own punishment... For second, if you can find a willing, sentient and judicially capable nonhuman, why not ;-) Keywords here are "consenting" and "adult".