Answer:
I stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
I've got a beautiful beautiful hall all walled in red velvet with all white armchairs made of bone and in the middle a woman dances.
The shorter I am the bigger I am.
I say everything I hear to others around. Iām not an animal nor part of the human race. I will immediately repeat after you; But only if my tail is in place.
You heard me before and then again. Afterward I die until you call me again.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?