I believe that any woman that is happily involved in a relationship only brings up her partner's past to hear how great she is when compared to all the "losers" he was involved with in the past.
Why else would she care to know?
What is the curiosity about? And if it really is just curiosity, then why get offended or hurt or jealous if he has something good to say about a past relationship?
guy (ahem not me): You should tell me how many partners you have?
gurl: (all quiet)
guy: relationships are based on truth, i promise not to get mad. Its just nice to know - no pressure
gurl: (all quiet)
guy: If you need to ask me ....
gurl: (intruppts) UFFOOO ... ginannay to do - abhi sirf 30 tek puhanchi hoon