Fifty per cent of all marriage ends in divorce. How can you claim faithful relationships? You must be kidding.So if same-sex relationships are legally recognized as "marriage," the idea of marriage as a sexually exclusive and faithful relationship will be dealt a serious blow. Adding monogamy and faithfulness to the other pillars of marriage that have already fallen will have overwhelmingly negative consequences for Americans' physical and mental health.
Where is your proof that there will be "overwhelmingly negative consequences for Americans' physical and mental health.?"
So far many learned lawyers have given this argument their best shot and failed in court.