Once defined by a logical man as repetition with expected change, The common man may describe me as behaviour that is strange, Criminals may use to me to plea unsoundness of mind, But the clinical community have left this term long behind

I'm one for a coverup, but I am no swimsuit. When truth's hard to handle, I trim and dilute.

What do Jim Carrey, Cher, and the phantom of the opera all have in common?

I hide the world, then let it through, With just a pull, I change the view. On stage or window, I may fall, what am I, soft divider for all?

Fast and high, I’m a swift little fellow Painful to do when your throat is not mellow