Super Thinker, I have been skipping your posts because I did not know you are that sensible. If this is the kind of material you write, I will always read.
However, for me,I would rather stay in ignorance. Once it is known, to pre-empty, may be because I was to discover anyway, or just to show that another man fancies her, or out of rage, or any other reason, I will call it quits and let the other man have her. Simple and amicable - she has rejected me and it is her choice. Even if I were to persuade her to stop the habit, we could be lying to each other. She will do it again, or I will have no respect for her, or she will forever live in guilt, which is unhealthy relationship