Answer:
lighter than feather and softer than silk yet the strongest man in the world cannot hold me for more than a few minutes.
Iron roof, glass walls, I burn and burn but never fall. What am I?
I am an English word with 3 consecutive double letters.
By Moon or by Sun I shall be found. Yet I am undone if there's no light around.
I have a strong affection for belly buttons.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?