This project examines the increasing participation in casual sexual relationships and experiences (CSRE’s) among millennial emerging adults as a temporal population shift in relationship behaviour, and seeks to imagine how this shift might impact millennials’ capacity to form long-lasting romantic partnerships as they develop into their adult stage of life. To do so, it develops a
foresight methodology based in cultural historical activity theory, adapting Engeström’s model for the structure of human activity as a framework for conceptualizing the systemic dynamic of activity directed toward a future object. The millennial emerging adult’s participation in a series of CSRE’s is conceived of as an activity directed toward the future object of establishing a long-lasting
romantic relationship. Attention is paid to the mediating role of mobile dating apps, linguistic practices associated with CSRE’s, and the expansive potential of memes.