For you to decide, Pros are that you can find out what really bothers him. Cons are that hes not talking about you, but another girl. As a guy, once you are out of an old relationship, my #1 rule is to never bring it up if currently dating or have a new gf
I personally wouldn't mind to hear about it. I know I have had my own stories ect but sometimes the topic never occurs and you never really know. I am pretty sure my first bf will never talk about me .