Your past is your past. There is no rule regarding discussing previous partners however, sometimes, a person will say, "tell me, I won't get upset" but nine times out of ten, whether male or female, they do get bothered or upset. Only you can make this decision.
If you are talking about events in the past there is no problem with including your exes in the conversation. But generally people don't like their lovers talking about their ex-lovers just to talk about them.
don't talk about your ex"s there the past you don't look back on bad relationships you gotta look forward and stay confident about your girl friend, wife, etc. i personally don't like for my fionsey to talk about his ex's and so i defiantly don't talk about mine its a sensitive subject because you want to feel like your the only thing that matters to him or her and when your lover talks about an ex lover it makes you feel like they care more about the ex than you..
I went through the same thing. You may not miss them you just miss the memories y'all had together. I'm not the type to talk about things I like to write my feelings out. It helps get things off your mind