A secret is something that we intentionally hide . But as we are all different is is according to our own personality and culture what things are to be kept.
I have a detective personality. I enjoy finding out things people hide.
I love crime stories where it is necessary to guess all the purposes a person may have had to commit a crime.
I think that a secret is always painful, like a sting hurting . The less secrets we have the happier and truer we are. What do you think?