My dad was a Marine. He was one of the Montford Point Marines. Those are the equivalent of the Tuskegee Airmen for Marines. He's a tough tough guy. When I was 15 we had a fight and I didn't speak to him for 10 years.
If one is going to change the definition of marriage to be quote 'same sex ' then there is absolutely no valid argument constitutionally or rhetorically you can make against multiple people getting married. These are radical social changes.
