I guess whatever we say is a right, is a right....is that how it goes?
Until you tell me why it isn't...
Mar, that's the definition of
liberty. You are free to do something (anything) unless you are somehow infringing on either another individual or society's rights.
Since you continually cite libertarians, I'm quite shocked that when it comes to same-sex marriage you somehow forget that people are
free, and therefore have a right to do anything and everything that is not otherwise prohibited.
Freedom means you have a right to generally do what you please. For someone to take away that freedom, i.e., the government, society needs to demonstrate a rational reason that such a freedom is somehow gravely detrimental to the purpose of government, or to other individuals.
Unfortunately, many people here, and I fear you fall into this too, espouse libertarian views but don't fully understand them. That's why I'm explaining this to you, repeatedly, to get you to understand what your rights are.
Not surprisingly, rather than making a
libertarian argument, you are making an
authoritarian one; wherein, the basis of your claim is that as of yet unenumerated rights are not an emergent quality of being a free person exercising their right to liberty (think about how one does this) - but instead, must be specifically granted from government action, charter, or declaration.
This isn't a libertarian (or even an accurate) view of the way
rights work. Again, rights are not given to you by government, but instead, by the Creator; or, in other words, they are emergent properties of your own sentience. Government can either choose to recognize or fail to recognize rights, but they cannot
give them to people.
To answer your original question in a more succinct manner, and perhaps this might help, Kant, Hobbes, Lock, and Rousseau all generally agreed on the natural rights of Life, Liberty, and Happiness; where one could potentially further extend to Property.
Your right to marry is imminently derived from your right to liberty
(why can't you be married?) and your right to happiness
(marriage makes people happy, we are naturally monogamous creatures). From a libertarian standpoint, there is also your right to property, as a marriage defines a unique, unalterable, and enforceable shared property contract.
So again, we can dance around the issue because we don't want certain people to be married - but, from any standpoint you look at this from, the government has no role in preventing LGBT couples from marrying. None. They have the same rights as you or I do. If you want to do away with the institution of marriage, that's a tangential argument.
"If liberty means anything at all, it means the right to tell people what they do not want to hear." - George Orwell