The better question is how do you stay in control? There is a lot of motivation in tears, in fact more than normal. Everybody has a breaking point, even hard men, it just takes the right approach. Crying is basically expressing your inner-most emotion. Get that? Inner-most emoton. The same place where most of our last deepest aura resides. Anything can happen when this bottomless heathen of hell's fury is breached by external forces some people cry and some don't, some people are very emotional while some aren't. Nonetheless it is the very last nerve. Crying can mean two thing; saddness or happiness, its not necessarily a show of weakness but lack of control.