Why sad people cry?

Sad songs often make people cry, or make people feel like crying when there was either a break-up in their life or something tragic or sad has happened. The reason for this is because when you constantly have something on your mind about a loved one or something that's bothering you, when you listen to a song it's just a coincidence that the song has something to do with something going on in your life. Before when there was nothing wrong, you never noticed of what the song meant. Because you had nothing on your mind and nothing was bothering you. That's why sad songs make people cry, or feel like crying. It happens to almost everyone.

if you want to experience this, listen to anything by Justin Beiber bc its so bad you will cry