Riddle me this:
The curious obtain a desire,
To draw me back from the glass.
Remove the obvious liar,
To find me in first class.
But before you play the third,
You must take out the sharpest wedge.
Then join the two and reword,
To know why I might hide the ledge.
I usually hang in a pair,
And obscure a view when closed.
Covered with strands of hair,
I can make both sides exposed.
Decoration is my destiny,
With other purposes too;
For example, some prefer privacy,
Or to not let the day come through.
What am I?
I feel like the second half might give it away, but I am willing to risk it — I don't want this riddle to be too opaque.