Good Riddles

Question: A girl lives on the 26th floor of a building. She takes the elevator down to the lobby and goes to school each day. When school is over she goes to the 20th floor on the elevator and walks up 6 flights of stairs to her room. But if she is riding with somebody else on the elevator she goes all the way to the 26th floor.

Why does she do so?

Question: What stays where it is when it goes off?

Question: I can't go left, I can't go right. I am forever stuck in a building over three stories high. What am I?

Question: The more you add, the less it weighs.

Question: I'm simple for a few people But hard for them to hear I live inside of secrets I bring people's worst fears What am I?