Both unilateral and bilateral contracts are enforceable in court. For example, a unilateral contract is enforceable when someone chooses to begin fulfilling the act demanded by the promisor. A bilateral contract is enforceable from the get-go; both parties are bound the promise.
Yes, scratching is a form of self harm. Try to tackle this problem while you can because it has the potential to get worse. I started out scratching and now I burn myself with a lighter and cut myself. It's a self-destructive way to deal with overwhelming mental/emotional pain.
Self-harm can be a way of coping with problems. It may help you express feelings you canât put into words, distract you from your life, or release emotional pain. Afterwards, you probably feel betterâat least for a little while. But then the painful feelings return, and you feel the urge to hurt yourself again.