Performing arts have by nature the possibility to emotionally involve the audience in ways, which are, in some important sense, \u201cdirect\u201d and active, instead of contemplative. The audience is in the presence of flesh and blood people doing various things and of events happening in front of them. In other words, the artistic event happens live, in front of the spectators' eyes and ears, and sometimes it can even end with the audience turned into performers. This fact has lead some scholars to affirm that, to a certain extent, performing arts seem to cancel or at least to minimize the gap between art and life. This trend is mainly strong in more or less new art forms and art movements, like Performance Art, Happening, etc., that, for...