Tuesday Twitter Trivia – Whistling on Stage

whistleI hope that everyone had a lovely holiday thus far.  It was totally relaxing for myself!  As for presents… Let’s just say I was a good boy this year!  More about the presents later and on to this weeks Tuesday Twitter Trivia.  I am going Old School here and have a great question about theatre history and not just specifically lighting related. So, this weeks question is:

Why are we not allowed to whistle while on stage?

Know why?  As with almost every Tuesday Twitter Trivia Question, Direct Message me @isquint through twitter.  First one in with a brief explanation, wins! Remember, you only have 140 character to explain! Good Luck everyone!