Update: One of the comments raises an interesting angle. Should one partner's faithfulness be dependent on the actions/inactions of the other?
"Faithfulness isn't a trait you can sit back and expect your partner to just have. e.g. If I want to be the only one my partner has intimate conversations with, I need to let her know that. My role would be to always be available to her for that. If she goes off and has intimate conversations with someone else, i'd say she has been unfaithful. If I didnt make myself readily available, I can't totally blame her." - Think-about-it
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We've read about how Dunni was broken-hearted by her former boyfriend's infidelity. In fact, she caught him with another woman almost pants down after they'd been dating for two years. In his defense, he said he wasn't the monogamous type of guy and asked her to understand. So the question is, how possible is it for people to remain faithful to one person in a long-term relationship?