Why Do People Have To Open The "EX Files"?

In a relationship do we have to go backwards to go forwards?, because it seems that we want to know about the past and it seems that we can't go forward without knowing what we have in the past it's like having a wound that won't heal and sometimes we go overboard in wanting to know what our partners did in the past and in a way it starts to ruin the relationship because people have this hole that needs to be filled but what if your past brings up memories which should be left were they were buried so it causes more problems than it solves.

But it still doesn't answer the question why do people bring up the past, Is because we all feel insecure about what that person has done before and whether they have seen and done better so there is always this doubt in your mind, this little voice asking you have you done the right thing.

But is this the only reason????? Can people really want to know what went on in their partners past??? Do we all want a sense of control about what went on????

There are so many questions on the reasons why people are hell bent on knowing the past but in trying so hard to see the past do we see forget to look ahead of us?