"Ever wonder why a wrong number is never busy?" goes a question in a chain mail. It immediately strikes a chord in you. You feel, "Really! How true!"
You hear this sob story. "Whenever I miss a call from an unknown number and call back, I find it to be a guy who called a wrong number". That strikes a chord too. "Happens all the time".
He got an engaged wrong number didn't he? You know what I mean?