Men, in general, are happy in their relationships. And yet women -- the very people responsible for making guys so happy -- spend a great deal of time fretting over whether their men want to stay in the relationship or are waiting to catch the next bus out of it. Indeed, women spend so much time fretting that they often ask men to talk more about ... gasp! ... their feelings. And the one thing that can make a contented guy discontented is being asked to talk about his feelings. It's like cooking up a great souffle, and then opening the oven to check on it -- and presto, the souffle goes flat.
It's not that you should never ask a man about his feelings. But it's all about technique: you need to coax him to that place where he can share; pushing him just makes him stubborn.