Some facts on crying -
Rene' Decartes thought tears were a kind of rain. The condensation is caused when hot blood came in contact with tiny cool winds that are the animating force inside the body.
In some parts of the ancient world, mourners would collect tears in vials, seal them, and bury them with the dead.
In 1994, the ruling junta in Ethiopia declared it a crime for mothers to cry for their "diappeared" sons. The were scared that such emotions would then lead to efforts to avenge the dead.
According to Shakespeare, tears are "women's weapons."
William Fry found that tears have 30 times the manganese found in the blood. Since autopsies of chronic depressives have found concentrations of manganese in the brain, he feels that crying could be a way to keep depression at bay.
Thomas Hobbes (17th century philosopher) said that crying is caused by powerlessness. That's why, according to him, children cry more often than adults and women cry more often than men.
Homeopath Peter Van Oosterum (in a 1998 book) suggested that, to cure sadness, one should drink a solution containing one's own tears.