Rationalization - ex wants to revisit all the "valid" reasons for demise of M
Ego Boost - ex just wants to know you still have an interest
Fishing Expedition - ex wants to see how you feel before sharing his/her feelings
Remorseful - ex realizes what he/she has done and wants to apologize
Reconciliation - ex wants to pickup R
Would you talk to your ex in any of these scenarios?
NMD
"Chains do not hold a marriage together. It is threads, hundreds of tiny threads which sew people together through the years. That is what makes a marriage last --more than passion or even sex!" - Simone Signoret