Is it beneficial or harmful to be "too" honest in a marriage/long term relationship (plz read details of ques)?

the mind is curious and it goes were it tends to end up what ever your confortable sharing or not will probably only change the future some and your wife wont mind either but the bad things about open doors sometimes there hard to close so its easiest to forget their there and focus more on the windows... you only live once either u can take it forgraunted or you can chose to do something with what you know and aply yourself toward a future