At this point, I think I must respectfully ask that we agree to disagree, as our assumptions are so different that I can't see us finding any common ground in the near future.
That's fine.
I am concerned with the rights of a natyural father with his children, and those of a lawfully adoptive father with his children.
I have no interest at all in furthering the agenda of a movement that defines fatherhood as fungible. As a father, I am not replaceable by a second woman. The same goes with mothers. Gay people may or may not be able to choose who they are attracted to, but they sure as God Made Little Green Apples are able to choose who they procreate with, and as far as I am concerned, if you bring a child into this world with the specific intent of dis-involving one or both natural parents, you are a child abuser, and unfit to be a parent.
What I will support is the abolishment of secular marriage, removal of laws which give automatic benefits to married couples, allowing people to make civil domestic contracts - without a "one size fits all" contract - and returning marriage to the domain of religion from whence it arose to begin with.