Why do we feel better after a "good cry"? An expert explains the science behind it.

Why do we weep? There are actually some good reasons for it — and an explanation for why a little blubbering can make us feel better. 

On "CBS Mornings Plus" Wednesday, Dr. Gail Saltz, an associate professor of psychiatry at the New York Presbyterian Hospital Weill-Cornell School of Medicine, shared there are actually different types of tears, which serve different purposes. 

Some tears cleanse your eyes and keep them moist.