Answer:
I cannot be felt, seen or touched; Yet I can be found in everybody; My existence is always in debate; Yet there is a style of music named after me.
Without this, H2O would just be 2O
Something you carry while singing.
This is a shape and a symbol that we literally cannot live without. What is it?
If it is absolute, it will corrupt absolutely.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?