What Moves

Riddle: I am an object. I move from left to right. Anytime I move, I bleed on what is below me. I can't move without you. I move only when you uses me. What am I?

Answer: A pen.

Source: https://www.riddles.com/5257

I am an object. I move from left to right. Anytime I move, I bleed on what is below me. I can't move without you. I move only when you uses me. What am I? — What moves by Moroyei Bayelsa Ebiakpo v1.

Riddle: I am an object. I move from left to right. Anytime I move, I bleed on what is below me. I can't move without you. I move only when you uses me. What am I? Answer: A pen. — by Moroyei Bayelsa Ebiakpo v2.