Answer:
I am shared by goats devils and unicorns.
I don't live within a house, nor do I live without. Most will use me when they come in, and again when they go out. What am I?
I'm simple for a few people, but hard for them to hear. I live inside of secrets and bring people's worst fears. What am I?
cats and deflation tires make this noise.
I am a fruit with seed on the outside. What am I?
Give it food and it will live, give it water and it will die.