Answer:
I look like a tiny trombone
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
I can be hairy and itchy all over. I can be the scariest thing you have ever seen. I stand in the middle of nowhere, hanging on a stick. What am I?
I have 24 keys but cannot open any locks. Sometimes loud, sometimes soft. What am I?
What force and strength cannot get through, I with my unique teeth can do. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?