Riddle #620

Question: What is one in every doll, in every doll, in every doll?

Question: What can be broken but never forgotten?

Question: Where do all the letters sleep?

Question: People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?

Question: What tastes better than it smells?

Question: What goes in the water black and comes out red?