Sonnet 43: "What lips my lips have kissed" was first published in Edna St. Vincent Millay's Pulitzer Prize-winning poetry collection, The Harp-Weaver, and Other Poems (1923). This sonnet adheres to the Petrarchan form, with the rhyme scheme of ABBAABBA CDEDCE, and is composed in iambic pentameter. It features the poet's forgetfulness of her past lovers on the verge of her youth. Listen to the full sonnet with particular emphasis on the speaker's tone and mood.