The current paper involves a discussion of “The Young Infant's Triangular Communication in the Family: Access to Threesome Intersubjectivity?” Conceptual considerations and case illustrations. The work of the Lausanne Group is reviewed with special reference to its relevance to psychoanalytic theory and practice. The ingenuity of the design of the play paradigm is cited, with its illumination of the role of the body and interactive events in the construction of inner experience. Challenges to psychoanalytic thinking are discussed with special reference to the Oedipus complex and its precursors. A major difference involves the Lausanne group's position that triangles are not inherently problematic. The author also addresses the question of intersubjectivity as a motivational system, taking issue with the group's position that it is.