Answer:
Lovely and round, I shine with pale light. Grown in the darkness, a lady's delight. What am I?
I let water fall on you while everyone else stays dry. What am I?
I am as hard as metal, yet as flimsy as glass. I shine like a star, yet I am only a rock. What am I?
I like to twirl my body but keep my head up high. After I go in, everything becomes tight. What am I?
Use me if you really want to see inside someone
No matter how little or how much you use me, you change me every month.