"sanctify human mating"
There's nothing sanctified about oral. Sanctified lovemaking is when a husband and wife look at each other eye to eye, face to face, lip to lip.
"His left arm is under my head, and his right arm embraces me."
Song of Solomon 2:6
As for your suggestion that the "Song of Solomon" or "Song of Songs," is a pitch against orally addressing your mate? Read it through, friend! It has passages which describe the images and tastes of addressing the whole body of a woman. Solomon was a very lusty fellow!