One afternoon in Minas Tirith, Denethor discusses with a young Boromir and Faramir whether "kissing leads to trouble".
Denethor turned and saw Faramir running down the corridor toward his brother. "Kiss girls how?" Boromir asked, glancing apprehensively toward Denethor.
"I too would like to know," Denethor added, fixing his son with an authoritative stare.
"'Twas nothing!" Boromir claimed.
"Nay, your governess said kissing girls like that leads to trouble, when she found you and Eseleth in the study."
Boromir blushed, but Denethor placed his hand on his shoulder. "Miriel spoke of serving-girls. 'Tis natural and healthy for boys Boromir's age to kiss young ladies -- when both feel free to refuse."