That ' s something I was going to mention as well . Many people have a bad past but they ' ve moved on and many people won ' t even remember their past until someone brings it up again . I saw a conversation on Facebook between two friends and one of them asked , Do you remember in 10 th grade when we both left the school early without permission because the gate was open ? and the other guy went , Oh yeah , I wouldn ' t have remembered if you didn ' t bring it up ! So it is possible for people to forget their past as well because they moved on . Let ' s say someone in your past told your partner one of your past mistakes . Do you think it would be reasonable for your partner to get angry at you for not telling her even if there ' s a chance you didn ' t tell her because you forgot about it because the topic was never brought up ? Or you just didn ' t tell her because the topic was never brought up and many would agree that it is a bit awkward to say randomly , Fun fact , did you know I left school early without permission in 10 th grade ?