Crying is healthy. When we are severely overhelmed, we can't help but weep, says Jodi De Luca, Ph.D., a neuropsycologist at Tampa General Hospital. Our bodies can use crying to defuse bottled-up stress that can wreak havoc on our immune system.

Tears attrack kindness. It's likely that human tears envolved so we coul send out a clear nonverbal message : I need attention ! thus De Luca says, " They elicit as a sympathetic response in others"

It's a girl thing. Young males and females cry roughly the same amount, but one biological reason grown women cry more than men: After puberty, women's bodies contain much more of a hormone called prolactin, which is a main ingredient of emotional tears, women are able to form and shed tears at a much faster and more frequent rate.