1. An emotionally-expressive robot configured to respond to touches by an interactant, wherein the emotionally-expressive robot comprises: a body; and an emotion-expressing system, comprising: a touch sensor embedded within the body; a feedback generator; and a controller in communication with the touch sensor and the feedback generator, wherein the controller is configured to determine the emotional state of the robot based on feedback from the touch sensor, and wherein the feedback generator is configured to generate feedback indicative of the emotional state.