Say two people are in a relationship and it's super awesome and peachy keen and they are fundamentally compatible. Say one of the people has a secret about their past that, if they tell the other person, may cause them to get dumped or throw a significant rift into the relationship. But say it's an important thing that they feel their partner should know for the sake of being honest. Should they tell? Or to phrase the question another way: would you want your S.O. to tell you something that may cause you to dump them, if the other alternative was not knowing and therefore living happily with them happily ever after? Possible outcomes and reasons: A) they shouldn't tell, because why ruin a good thing? Everything is awesome; no need to ruin that B) they should tell, because full disclosure and objective truth are important foundations on which perception of personality and compatibility are built Obviously I choose Choice B, because currently the second person does not have complete information and their opinion of the first person is skewed.