Some women use their tongues–she look'd a lecture,
Each eye a sermon, and her brow a homily,
An all-in-all sufficient self-director,
Like the lamented late Sir Samuel Romilly,
The Law's expounder, and the State's corrector,
Whose suicide was almost an anomaly–
One sad example more, that "All is vanity,"–
(The jury brought their verdict in "Insanity.")
In short, she was a walking calculation,
Miss Edgeworth's novels stepping from their covers,
Or Mrs. Trimmer's books on education,
Or "Coelebs' Wife" set out in quest of lovers,
Morality's grim personification,
In which not Envy's self a flaw discovers;
To others' share let "female errors fall,"
For she had not even one–the worst of all.

This vivid passage from Byron's Don Juan paints a satirical portrait of Donna Inez, who serves as a caricature of unyielding moral perfection. Byron contrasts her with women who "use their tongues," suggesting that her very presence is an overwhelming moral lecture. Her eyes and brow convey a stern message, much like a sermon or a homily. With biting wit, Byron likens her to "Sir Samuel Romilly," a legal reformer known for his intellect but whose life ended in tragedy, emphasizing the futility of seeking perfection. Byron further mocks her by likening her to didactic figures and moralistic literature, such as "Miss Edgeworth's novels" and "Mrs. Trimmer's books on education." Her flawlessness becomes her greatest fault, an ironic twist illustrating how her rigid morality leaves no room for human error or warmth. Byron’s satire underscores his criticism of moral rigidity and the societal pressure for unattainable perfection.