"How could Jesus have been "by and of" her flesh if there was no "Mary" in Him? :)"
The scriptures are clear that Jesus was the "seed" of a woman and the "seed" of Abraham. Heb. 2:16-18, "For verily he took not on him the nature of angels; but he took on him the seed of Abraham. Wherefore in all things it behoved him to be made like unto his brethren, that he might be a merciful and faithful high priest in things pertaining to God, to make reconciliation for the sins of the people."
He got hungry and thirsty (Matt. 4:2; John 19:28).
He got tired from the journey (John 4:6).
He needed sleep and nourishment (Matt. 8:24).
If He was not born just the way everyone else was born (supernatural conception excepted) it could not be said "it behoved him to be made like unto his brethren" for there would be an important experience that He did not go through and a genetic history that excepted Him from the normal temptations and everyday trials.
What genetic history did Adam have? Was he not fully human? Did he not precede Abraham? Was Christ not the second Adam? What do genes have to do with this? Christ took the flesh of His Mother and in that flesh he was related to Abraham.
Good post, BD.