Smile if you understand

Does sentient intelligence require a body? Speaking as someone who can become completely absorbed in the pleasure of hand-planing Walnut and who also loves the act of rational introspection, I think the answer is yes. It seems to me that the common element in such wildly different endeavors as childhood education, sport and theater is embodied cognition.

Does smiling actually help one understand better a sentence describing a pleasant event? Scientific American has more on an emerging idea.