Forty-five States as the gentleman just said have determined by people that were elected by the people of that State that marriage is the definition of one man and one woman.
Thousands of years and many civilizations have defined a marriage as the union between one man and one woman. With few exceptions those civilizations that did not follow that perished.
Next Article
I figure no matter how old you are it's always going to be your first marriage and no life experience is going to make you a better judge of who you should marry.