Didn't we evolve over thousands of years where men hunted together in nomadic tribes where trust and reliability was essential for the cooperative success of the hunt? Being highly emotional and expressive of inner feelings at random or inappropriate times probably got others killed. These patterns established over millennia aren't something you break on a Sunday over a cup of tea and a biscuit.
Discussion
Men are not robots. they are full humans.
Are you suggesting that men need to be robots to be good hunters? We have this weird obsession in our culture with thinking that emotion and logic are incompatible things. That is tragically inaccurate.
There is a line from an episode of Star Trek that I love "Emotional considerations to no impede my logic, they inform my logic." Feelings are simply messages from your subconscious, it is very unwise to suppress or ignore them.
It is extremely unwise to indulge in emotion in many moments in your life requiring your full cognitive abilities and focus.