Women cry approximately four times as much as men — about 64 times a year for women as opposed to 17 for men. It may be due to a protein named prolactin, which also controls breast milk production, is present when someone cries emotional tears. The protein gets the endocrine system flowing, making people more prone to crying. Women may possess as much as 60 percent more prolactin in their bodies at any given time compared to men.
Another reason may be men sweat more than women. When men sweat, they may release some of the toxins that are found in emotional tears, lessening their need to cry.
Men also have smaller tear glands than women, so when they do cry, they cry fewer tears than women do.