What is it ?

Question: Stars, scores and springs have them. Fingers, and backs have them. Keys, switches and cups have them. Leaders and mothers have them.

Question: What tastes better than it smells?

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

Question: What asks but never answers?

Question: What has a face and two hands?

Question: I come in many different colors. I create boundaries to keep things concealed and safe. My best friend is a lock and I am also made of different materials as well. I love to travel: you can find me anywhere. What am I?