It is known that emotions are experienced by both body and mind. Oftentimes, emotions are evoked by sub-symbolic stimuli, such as colors, shapes, gestures, or music. We have built eMoto, a mobile service for sending affective messages to others, with the explicit aim of addressing such sensing. Through combining affective gestures for input with affective expressions that make use of colors, shapes and animations for the background of messages, the interaction pulls the user into an embodied `affective loop'. We present a user study of eMoto where 12 out of 18 subjects got both physically and emotionally involved in the interaction. The study also shows that the designed `openness' and ambiguity of the expressions, was appreciated and understood by our subjects. Author Keywords Affective interaction, gestured-based interaction, usercentered design, ambiguity ACM Classification Keywords H.5.2 [Information Systems]: User interfaces ? graphical user interfaces (GUI), interactio...