If you have me, you want to share me. If you share me, you haven't got me. What am I?

Why this works

This riddle plays with the concept of a "secret." When you have a secret, there's often a strong desire to share it with someone else, as secrets can feel burdensome or exciting. However, once you share that secret, it no longer remains a secret to you; it becomes known to others, meaning you no longer "have" it in the same sense. This clever wordplay highlights how the act of sharing transforms the nature of a secret, creating a fun paradox!