Man & Woman

Had an interesting discussion with some friends this noon.

Why does man likes to hide their feelings and things from others?
Why does woman likes to share everything with everyone?
Is it possible to find a man who shares everything and a woman who hides everything.

Why does man prefer to share abt their work & career with their males friends rather than female.
Why does man prefer to share abt their r/s and emotional issues with their female friends?
Preliminary explanation is man thinks that speaking abt their career or job to female friends will not help at all and speaking to woman abt their r/s is to get their opinions of what are they thinking about cause man always don't understand what woman is thinking about.