Answer:
What goes in the water red, and comes out black?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?
What does everyone know how to open but not how to close?
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
What is it that was given to you, belongs only to you. And yet your friends use it more than you do?
Long and slinky like a trout, never sings till it's guts come out.