Why are girls just so emotional?

Do guys randomly cry at weird times of the day? Even if they do cry, I don't think they will talk about it. Something to do with man's ego? (I think) If guys do cry, I would think that they are seriously sad about a certain issue and that issue probably hit hard at some deep part in their hearts. When girls cry, it would probably because of some hormonal change? Seriously, the tears just flow and the heart is overwhelm for no valid reason and there is no way to explain it.

I parked the car at the wrong place and felt sad about it, like really sad till my eyes watered:/

Of course, there are other centered issues. There is always something to explain everything.

Feeling the need to discipline my heart and mind.