Girl
means what boy is not--she has what he doesn't have--she is more patient and intuitive--she can deliver babies when she's old enough to marry--
she will then be the centre of the home and bring the kids every joy through her love and dedication (the boy is then the father who just watches on and says: Yes, very nice, very good,  we are a happy family'--
where would you and I be if we had no mothers who were once the sweetest and prettiest girls?