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.
Hurting yourself, sometimes called self-injury, is when a person deliberately hurts his or her own body. Some self-injuries can leave scars that wonât go away, while others leave marks or bruises that eventually will go away. These are some forms of self-injury: cutting yourself (such as using a razor blade, knife or other sharp object to cut the skin) punching yourself or other objects.