I was roaming around the darker recesses of the internet when I stumbled across this infographic. I thought it might be of some interest to you (click to embiggen).
What it comes down to is, under our social contract (i.e. the U.S. Constitution) no person has the right to force another to live by a moral code not of their choosing. An ethical code yes, but not a moral one. That means that if I choose to marry a woman, a man, an eighteen year old or an eighty year old, it's no bloody business of yours. So long as I violate no municipal, state or federal ordinance, I may do as I wish. Any attempt to infringe on that, is a violation of the social contract.
Plus it really pisses me off.