Answer:
Lovely and round I shine with pale light grown in the darkness a lady's delight.
Born in the ocean and white as snow. When I fall back to water I disappear without a trace.
Everyone in the world needs me. They generously give me but never take me. What am I?
Soft hairy from door to door. I am the pet that always stays on the floor.
I fly yet I have no wings. I cry yet I have no eyes. Darkness follows me. Lower light I never see.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?