Answer:
Many hear me, but no one sees me, and I only speak when spoken to
I am a good state, there can be no doubt of itΝΎ But those who are in, entirely are out of it.
I always follow my brother but you cannot see me, only him. You cannot hear him but you can hear me. What are we?
Long and slinky like a trout, never sings till it's guts come out.
A precious fluid, thicker than water.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?