Well, the man and his wife shall be one flesh....
Matt 19:4-54 And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female, 5 And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh?
How did Adam know that a man shall leave his father and mother, having neither himself, unless maybe the Spirit and the Word are the procreators of the soul?