Did you know that tears brought on by certain emotions are chemically different from each other?

We can all agree that our emotions can sometimes control us, but our emotions can also determine the chemical makeup of our tears. For example tears of grief or sadness contain the chemical leucine enkephalin, which is a natural pain killer.

Another cool fact about crying is that you can tell the emotion of a person depending on which eye the first tear comes out of. If the first tear comes out of the right eye, the person is crying tears of joy. If the first tear comes out of the left eye, the person is in pain (emotional or physical). If the first tears come out of both eyes simultaneously, it means the person is frustrated.