Sometimes we want to be totally frank with our beloved. And it's just natural, for as it usually happens, after a certain period of time (provided that your relationships are developing in a nice way) you feel that the two of you are close enough so that to reveal some tidbits about your past life.
Of course, the frankness is important, but so your sound mind should be. Beyond any doubt, sometimes it's desire to hash some situation with your gf that sets you telling obscure stories of your past, but guys, I don't think that a girl may be very clever at giving you a good piece of advice, so it's needless thing. And what is more, no girl is ready to hear stories about your cheating on past girlfriends or about enjoying kinky sexual experience.
It's really doubtful whether your sweetheart will appreciate your deed or go through the roof.
So, pals, my idea, or rather my advice is to keep shameful things you've done in the past private.
In the long run, you may part in time, so