Answer:
I am a caribbean shape that makes ships disappear
I have a neck and no head two arms but no hands. I go with you to school I go with you to work.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.
What is so fragile that saying its name breaks it?
I produce wool and spit a lot
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?