The term “duet” has been employed in literature with rich versatility, functioning both as a literal description of a musical performance and as a metaphor for harmonious or contrasting partnerships. In many narratives, such as those by Chekhov ([1], [2], [3]) and Chopin ([4], [5]), “duet” vividly captures the intimate act of sharing music, imbuing the moment with a sense of fleeting beauty or domestic simplicity. Mark Twain ([6]) and Oscar Wilde ([7], [8]) extend this imagery, at times critiquing the missed opportunities for a blend of voices or playfully noting the complexities of performance. Authors like Dumas ([9]) and George Eliot ([10], [11], [12], [13]) elevate the expression, using the duet as a symbol for artistic passion and emotional interplay, while even texts such as those by Thomas Jefferson ([14], [15], [16], [17]) invoke the term in more formal or analytical contexts. This breadth of usage across genres and periods highlights how “duet” effectively conveys the nuanced interplay of individual contributions, whether on a piano, in conversation, or in the melding of ideas.