America is known for allowing its citizens to do what they want
Do you not see the difference between:
1) Me and my guy are in our own home engaging in a relationship which we desire between consenting adults and it's none of your freaking business, go away
2) I want to be left alone, which means government must validate my relationship, provide me with , tax breaks, ...
One of those meets the standard of allowing citizens to do what they want, the other doesn't. Doing what you want does not come with it the right do demand things of others.