A - If there is a God that created us, who's to say that the same aspect and idea of creating live via divine means isn't seen in females in their ability to nurture life?
B - Pope Boniface VIII was believed to be an agent of the divine on Earth. As such, when he made a decree, it would only be fitting for him to say it was not of his choice, but the choice of the divine. Does this make it real? A man's writings are nothing but words on paper. There is no proof as to who delivered the words that Boniface VIII wrote, whether it was a divine being or simply delirium in his mind. As there is no proof that any god or goddess exists, quoting the words of a man, calling them divine, then calling someone "clinically retarded" is wrong on so many levels.
C -
Tamen Dico
By definition, you can't predicate the Divine Nature of a gender. Gender is something that's almost entirely predicated of bodies...but by definition God is not a body. He is not composed of matter and form.
However, when God took a human nature, He did become a man. Jesus wasn't a woman.
If God's child had took the form of a woman, no one would have listened to her, she would have been called mad, and probably exiled if she continued to have "visions" and hear "voices" of her divine father. In the time of Jesus' birth, women were nothing more than house-slaves and soil for men to plant their seed.
D - For God to have been female, by human standards, there would have had to have been a "papa" for Adam and Eve to have been sired from. That would take the monotheistic aspect out of Christianity, I believe.
E - No matter what, we can tell that Adam was not black. Have you ever tried taking a rib from a black man? </sarcasm>