If two men or two women marry- none of that changes.
But it does change. There are no distinct mother of father figures in that so called "family" Girls/boys would not have the affinity to their opposite sex
Do you really not understand that we still have the children whether you let us marry or not? You harm our families by denying civil marriage.
Also, studies show that children do best in two parent households. The gender of the parents don't matter.
Don't call it
marriage call it civil union. Don't call your female partner wife or male partner husband of the same sex relationship.
And this is an example of the authoritarianism common to most on the right, the propensity to seek to compel conformity through force of law, to enhance the power and authority of the state at the expense of individual liberty.
Marriage law can accommodate same- or opposite-sex couples, when same-sex couples enter into a marriage contract, they are in fact lawfully married, no different than opposite-sex couples.
'Civil unions' are segregation, and just as repugnant to the Constitution.