Answer:
With a halo of water and a tongue of wood, stone as skin long I stood. What am I?
Die without me, never thank me. Walk right through me, never feel me. Always watching, never speaking. Always lurking, never seen. What am I?
I am so delicious that I require a house to contain me.
I only exist when you are here. Where you never were I can never be.
I go inside boots and outside shoes. What am I?
What made Cyclops quit teaching?