Where the links are clearer, we can, of course, manipulate the situation and use our Incidental Gestures in a
contrived way. If a student listening to a lecture is not tired, but wishes to insult the speaker, he can deliberately
adopt a bored, slumped posture, knowing that its message will get across. This is a Stylized Incidental Gesture -
a mechanical action that is being artificially employed as a pure signal. Many of the common 'courtesies' also fall
into this category - as when we greedily eat up a plate of food that we do not want and which we do not like,
merely to transmit a suitably grateful signal to our hosts. Controlling our Incidental Gestures in this way is one of
the processes that every child must learn as it grows up and learns to adapt to the rules of conduct of the society
in which it lives