Tears are the feminine weapon and means of protection. The tears of woman may irritate, stupefy or attract men. Women have learned to use the power of their cry wisely since the beginning of civilization. But they never cry without any reason even if everything seems to be all right. There always exists some emotional impulse that makes women shed tears.
It may seem to you surprising but the constant readiness to cry has the simple scientific explanation. The blood of a feminine organism contains the hormone called prolactin. It is responsible for tear liquid evolving and producing of milk during the lactation period. The male body contains testosteron which reduces the amount of tears produced.