A nurse saw a patient in the psychiatric ward writing a letter. She got curious and went to take a peek. But the patient didn’t want to let her see.
Unable to contain her curiosity, the nurse asked, “Who are you writing to?”
The patient replied, “I’m writing a letter to myself…”
Her curiosity grew and she thought to herself, “Why would someone write a letter to himself?”
So she asked again, “So… what’s written inside?”
The patient finally snapped and said, “What the hell’s the matter with you?! I haven’t received the letter yet, how would I know?”