If you have it you want to share it if you share it you can't have it what is it?

nothing Virginity: If you have your virginity, you can't share it, if you share your virginity, you no longer have itNothing is the correct answer. If you have nothing, it is impossible to share...

if you have it, you want to share it. if you share it, you don't have it.

secret

A secret.

Not necessarily. You could only share some of it, or maybe share it in such a way as to retain ownership.