In this setup, prospective partners must sidestep the typical trajectory for romantic relationships—what’s been called “the relationship escalator.” This term refers to the expectation that a couple in a “serious” relationship should ramp up their commitment and entwinement, becoming exclusive and accumulating roles of confidant, roommate, co-homeowner, co-parent, caregiver, default plus-one. Like an escalator, these expectations have a momentum of their own.
