You see things from a woman's perspective, and projecting your understanding of yourself as a woman to men. Men are action-oriented, and they use their emotions to act, not to sit down and talk about them. Men can say things like "this annoyed me" and "I was upset at that", but they don't express every single feeling, and sit and be emotional outwardly about them. The emotion center in women's brains is larger than in men, that's why women are more emotional. Because it's natural. Just to be clear here: what do you mean by men to be more open about their emotions? Could you give an example?