grade signals: the tongue on the lip
For the series of signals of pleasure rating and here's a good example. The act of slowly ran his tongue over his upper lip is the result from those of pleasure and satisfaction, other signs to confirm that this is like the eyes and posture in both arms and open legs. If it was a sign of nervous tension, the language usually have a flash much faster and more often on the lower lip rather than, as in this case. In short, Mr. Costa had not seen the proportion of hours to be presented ... almost, almost complacent.
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