Answer:
I come in different colors and shapes. Some parts of me are curvy some are straight. You can put me anywhere you like but there is only one right place for me.
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. What am I?
I am always in front of you, but yet I am never here. What am I?
I go up and down at the same time. Up towards to sky and down towards the ground. What am I?
I mirror your actions.
I am your mother's brother's only brother in law. Who am I?