Similarly, if, as I am convinced of, marriage really exists to attach mothers and fathers to their children and to one another, upon whose stability the children depend, then you can see why it makes perfect sense to restrict two individuals of the same sex to "marry" as they cannot, in principle, fulfill the public purpose of marriage so construed. It would likewise be erroneous to assert that marriage, so understood, would be "unequal" or otherwise "discriminatory" insofar as every single individual would have the exact same rights and restrictions regarding whom they can marry, regardless of their sexual orientation, namely, that any individual can marry someone of the opposite sex (plus some other qualifications). So understood, gay people are not being discriminated against (at least in this area), nor are they being denied the right to marry. They can marry. They're absolutely free to marry. They, just like any other human being, have to find someone of the opposite sex to marry. It would be discriminatory to deny a gay man the right to wed a woman (that is, marry) simply because he was gay, sure, but a person is not discriminated against if the state says no one has access to something that isn't real or something that no one can have access to.