So, you want to get married and think you have a case?
Okay.
"I want to marry 3 women." When can I expect an invitation to your nuptials? Oh, it's a hypothetical? Then your argument is hypothetical.
"I want to marry my dog." When can I expect an invitation to your nuptials? Oh, it's a hypothetical designed to mock people that actually want to spend their lives together as a married couple? Please make sure to mock people, period. Were you unable to get a date for your cousin's marriage?
Arguments against Gay Marriage (and that is all this is, really)
"It's unnatural. You shouldn't marry because you can't have/raise kids." It's amazing that you say that when Grandmothers and Grandfathers and Aunts and Uncles throughout this nation who are way beyond child bearing years did exactly that because they loved the children in their care as their own, did their best for them, even though they did not bear them.
I suggest you tell every single person that has been raised by extended family that they have an unnatural family - actually, I don't. I suggest you think before you open your mouth and say things that illustrate your poverty of spirit and education.