NO to sanctioning deviant unions.
What is marriage, and why did society create it in the first place?
What business is it of society to interfere with peoples wants, needs or whims?
First of all, we should realize marriage is not a contract to benefit either the man or the woman, (or as in current vogue) parties who choose to become participants. It is the states contract to guarantee offspring some basic security against the outside world.
Marriage was for the children!
Therefore it became a matter for the state to determine that little children were able to get the security of a family, without which society would have no basis and the state would have no foundation.
Since it is impossible for same-sex marriage to produce such offspring, using the term marriage for such a union is detrimental to the very meaning of the word and corrupts the purpose of the states right or responsibility for such a contract.
If so-called gays wish to pledge some sort of allegiance of fealty to one another, let them write their own contracts (much as corporations do when they merge), but to allow the marriage contract to be used for every willy-nilly union that anyone can imagine is corrupting the initial intent of the contract and can only hurt the very ones it was created to protect.
If government can deny multiple marriages and marriage to ones cow or dog or rosebush or whatever else comes along, then why should it be the right of some minority or even some majority to destroy a tradition that has fared society well since the beginning of history?
Absolutely! (See tagline.)