Actors are like kids, they need to play a little bit. And that's the nature of their job, they need to shake off some energy and then you as the director get them back on track. When you do loosen up the reins, you get some amazing things, but you have to wring out the performances for every last good drop.
The fashion industry is no more able to preserve a style that men and women have decided to abandon than to introduce one they do not choose to accept.