Answer:
What can be seen but never found that only hides in the unwound?
I have a face, yet no senses. But I don't really care, because time is of the essence.
Pregnant every time you see her, yet she never will give birth.
I can be written, I can be spoken, I can be exposed, I can be broken.
I am two-faced but bear only one. I have no legs but travel widely. Men spill much blood over me. Kings leave their imprint on me. I have greatest power when given away, yet lust for me keeps me locked away.
What do angels sing in the shower?