I dont think talking about what happened causes the problems... It is what actually happened itself that causes the problems...
Talking about it just gets it out in the open so that you can be honest with one another and so whatever happened in the past doesnt hit you in the face later on. In that case, not only might your partner be upset about your past, but also by the fact that you didn't come out with the truth to begin with.
True, your partner might not like what happened in the past.. and maybe dislike it so much as to dump you. At least whatever relationship you do/might end up having will be built on honesty though
Remain discreet in revealing too much intimate detail. It's perfectly okay to discuss the reasons behind past regrets & experiences, unless confessing too much would cause emotional or personal harm to the other party.
I have been with my soul mate for 16 years. we are junior high school sweet hearts. my advice and his is always keep it 100% real truthfull with lots of love and understanding 24/7 all year long....the love i have for my husbans ramiro is that we must have understanding and always forgive each other. learn from our mistakes.