Answer:
When you take away the whole from me there is always some left.
What is so delicate that saying its name breaks it?
When I am caught I am thrown away. When I escape you itch all day.
What is made of water but if you put it in water it will die?
I bring light to a dark world. In a current I travel and through tunnels I am hurled. Touch me and I'll kill you. What am I?
I flow from the Homerβs mouth when he sees doughnuts.