How do you make the case for same sex marriage?

[TaraJo]

Not to mention that

Ah, yes, I don't think I addressed their concern over the changing definition of marriage. I suppose I can include that as a concern to address. And, yes, the meaning behind marriage has changed drastically over the years. The most common marriage arrangement over the years has been one man, several wives, and the fact that bigamy or polygamy are illegal also testifies to the fact that we've changed the meaning of marriage.