Melchizedek was a king, like Jesus was a king.  The word "king" means ruler, sovereign, monarch, crowned head; and in patriarchal Israel it could only be a male, but not having father or mother is indicative that biological/patriarchal lineage was not critical.  Jesus was a male, born of a woman, but Joseph was not his biological father; another indication that biological/patriarchal lineage is not significant.  The TOB term "body-soul" is NOT sexless/genderless.  St John Paul II was no gnostic.  What it means is that being a body-soul is the fundamental nature of all human beings, and one that takes into account both the objective and subjective/spiritual dimensions of the human person.  See, e.g., the last paragraph of TOB 8:1.  See also CCC 456-483... human, flesh, body, "man" = human, male or female.  No "male" in these sections.  HINT: The word "male" is used in the CCC only 21 times, always in reference to Adam and Eve.  The word body, 378 times.  The word "human," 646 times.