Answer:
What is it that you ought to keep after you have given it to someone else?
Though I should be unique, you've made most of us the same. I would be stronger, if my characters were stranger.
Casper was a friendly one and Demi Moore made a clay pot with one.
What has keys but no locks, Space but no room, You can enter but you can’t exit.
Timid or weak people are said to not have these.
A word of five letters, Upside down is the same, A shark does this, But it’s not to blame. What is the word?