Why do we cry?

This week I had a beautiful session with a client about her grief over her parent's death. She was able to transform tears of loss for herself into tears of joy for a life long lived. I was honored to be a part of the process.  It got me thinking about tears and why we cry. Crying seems like such an odd thing for a body to do. What’s the point of squeezing water out of your eyes? And why does this strange thing make us feel better?