Meeting some of today's teenagers in the place where I spent my adolescence, I find myself admiring their self-discipline and generosity while regretting the apparent muting of youthful challenge and confrontation.
These include William Holman Hunt's beautiful "The Eve of Saint Agnes" (after Keats's poem) and the very early "Arming of a Knight" chair decorated by William Morris and Dante Gabriel Rossetti (exhibited with a youthful self-caricature by Edward Burne-Jones in which he depicts himself admiring that chair while seated on it).