Tons of women do this one thing.
And it always leave them feeling awful:

Keeping their feelings to themselves.

Put 2 men in a room and they will end up talking, drinking, giving one another advice on girls.
Put 2 women together and they can flood the room with hidden thoughts.

There are 2 possible reasons:
1. Women do not know themselves at all, and they are still searching for something.
2. Men and women are energetically opposite. Men tend to give away, while women tend to keep to themselves and never let go.
Do not call us selfish for this is our nature.
But if you insist, then what about men's ego?
Or maybe
3. Sometimes, we are just not comfortable in sharing it with man, for fear that we would be perceived as oversensitive, petty, weak,etc etc...

Why do I keep myself in a nutshell.
For fear of being judged.
Just like how i have judged others.
See how guilty I am now...
Karma...