You're sounding miffed, and the book isn't even out yet!
In the meantime read up on the Abbé Boullan who is best known for his "Law of Regeneration" more or less identical to the theory of Reintegration found at the heart of Martinism.
This will explain where the supposed "shamefull" comes into play. How Priests and ex-Priests took Nuns and/or prostitutes as their companions, who together performed various activities sex/magic.
Boullan’s biographer, Joanny Bricaud, wrote “Since the Fall from grace resulted from an illicit act of love, the Redemption of Humanity can only be achieved through acts of love accomplished in a religious manner”. It was believed that “guilty love must be combated through pure love, through a sexual approach, but in a heavenly manner, to the spirits in order to raise onself: this is the union of wisdom”.
............."The conflict arose not in the teachings but in the methods. The Catholic Church believed Man’s Salvation lay in the Sacraments of Baptism and Communion, Confession, Repentance etc., that could only be received from the Catholic Church. Whereas for the Gnostic, it was believed that the only way for Man to return to the state of grace he enjoyed before the Fall, was through true Gnosis and by confronting and working through his natural earthly sexual instinct.
What was the true nature of Saunière’s relationship with his house-keeper Marie Denarnaud, who refused to speak about such matters?
Did they shared the aim of Reintegration: the return to a state of perfect grace. Was this in fact the basis for the protracted and loyal relationship between Saunière and Marie? Is it not possible that they were imitating the ultimate relationship, as suggested in the Gnostic Gospels, that of his lord, Jesus Christ and Mary Magdalene, His most beloved disciple and the repentant sinner?" ( Guy Patton )
Get surfin' Jake and you'll need some strong coffee ready.