A singer should not only keep his eyes open, he should also roll them, widen and narrow them, squint, and, furthermore, should mug, pull faces, leer, ogle, grimace, and otherwise put his face through a series of contortions as a source of ongoing amusement - if a singer fails to do this, I will feel personally insulted. Nor will I be entirely pleased if a singer refrains from gamboling, capering, and prancing. It should be noted as well that the occasional somersault or cartwheel is never out of order, but, of course, these acrobatics are not to be overdone - it is all about the song and the singing, after all.

And don't get me started on the perversity of those instrumentalists who refuse to maintain the grin of a deranged chimpanzee while they play ... how dare they inflict such painful humiliation on their listeners!!