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But can you explain to me how different combinations of consenting adults being comitted to each other (as in one male and two females, one female and two males, two males and two females, etc.) are harmful to society? When everyone is there by choice, and lives as an equal?

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To be honest, I probably can't come up with a satisfactory explanation for that. I have a "hunch" that these kinds of relationships wouldn't really be beneficial for society, but I can't explain why, as I'm not an expert on psychology or sociology or whatever field of study would deal with this kind of thing.

I appreciate your honesty, but don't you see that this is a huge part of the problem with the issue of gay marriage? That people are against it without really understanding why? Without really knowing the realities of it?

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It seems to me that getting two parents to agree on how to raise a child is hard enough, so adding more would confound things even worse, but of course I can't prove that notion.

Please remember that not everybody views bearing and rasing children as a goal to be accomplished. Some of us never want children.

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So, my "personally distasteful" statement stands, but the "bad for society" part just applies to the real-world examples of polygamy I'm familiar with.

Well, being a strong athiest, I can't say I have anything to do with your "real-world examples" that you're familiar with, but I'm sure TWMBO will be pleased to know that they (we?) are merely "distasteful" and not necessarily "bad for society".