Answer:
I have fangs and enjoy piecing holes with a single bite.
I am a way to say goodbye to your sweetheart
Break me and I am better immediately set and harder to be broken again.
I cover what's real; hide what is true, but sometimes bring out the courage in you. What am I?
I can be repeated but rarely in the same way. I can't be changed but can be rewritten. I can be passed down but should not be forgotten.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?