"Those marriages would be the exception, not the norm."
It doesn't matter how rare a marriage is. It is still recognized. The law doesn't require that a marriage not be the norm to be valid.
"Logically speaking, that still is the primary purpose of marriage. Anything else is just the standard liberal attempt at undermining marriage and basic unit of society - the nuclear family."
That doesn't change the fact that the current law does not have child-rearing as a requirement. And until that changes, there's no merit to denying same-sex couples the same benefits.
"Strawman. How does it effect your life if your neighbor beats his wife and kids at home?"
Non-sequiter. You still haven't explained how either effects your marriage.