**Can anyone shed light on this argument that because Pope Gregory XVI decreed that the opinions of St. Alphonsus can be safely taught than it is immoral for oral stimulation to take place within the marital act .
Here is what I read about the decree made that is is safe to teach any opinion of St. Alphonsus.
“No ecclesiastical writer has ever received more direct, positive and formal approbation than that accorded by the Holy See to the moral writings of this Doctor of the Church. While still alive, four Popes expressed their admiration of his prudent doctrine. (…) In 1831, Pope Gregory XVI enhanced this approbation when he decreed that professors of theology could safely teach any opinion of St. Alphonsus, and that confessors, without weighting reasons, could safely follow him – simply on the fact that St. Alphonsus said so.
Here is St. Alphonsus opionion on oral stimulation:**
1: On Matrimony, Book VI, n. 491-492
St. Alphonsus considers a question on marital sexual acts:
Latin: An autem sit semper mortale, si vir immittat pudenda in os uxoris?
Translation: “Or whether it is always [a] mortal [sin], if the husband were to insert [his] penis into the mouth of [his] wife?”
Some theologians of that time period (1700’s) claimed that it would be moral, only if there was no danger that the husband would climax (“danger of pollution”). But then the Saint rejects their answer and gives an answer he asserts to be the truth:
Latin: Sed verius affirmant … tum quia in hoc actu ob calorem oris adest proxiumum periculum pollutionis, tum quia haec per se videtur nova species luxuriae contra naturam (dicta ab aliquibus irrumatio)
Translation: “But the truth is in the affirmative [citing several authors] … not only because, in this act, on account of the warmth of the mouth, there is proximate danger of pollution, but also because this [act] is considered [to be], in itself, an abnormal type of pleasure against nature (as has been said of any type of shameful sex).”
So why are their so many different teachings on this subject if this opinion was decreed safe to teach.