This is another issue where the definition of "right" is somewhat complicated.

Does one really have the "right" to have a son?

Does one really have the "right" to adopt a child? I mean, be it gay, straight, married or a widower, is there a "right" to become the parent of a child?

I honestly think this deserves a greater reflection than a mere "but other people CAN, so anyone has to be able to also," which is the implicit reasoning behind gay adoption or general adoption policies in modern countries.

Nothing to do, as i see it, with equality.