The person that falls into this creates a self fulfilling prophecy. Understand that but if an emotional affair starts and it leads to more, the trust is gone.
The comfortable partner has lost respect for her other half and it shows via not being able to talk and if sex is oriented, he definitely has lost it all. The woman in this way is the stoic one ...
Men are just as complex as women. That is what society downplays. Patriarchal driven women desire men to be simplistic so they are easier to control. But media and society doesn't talk to this.
The big question for women, would you feel comfortable with a man that is layered, sexual, smart and balanced. If you have one, imagine that other women will notice and the competition begins ...