Sounds silly, but please be kind.
Imagine that you had been insecure in the past with regard to partner talking about exes and other women. But then you have worked on your insecurity, how do you show in your relationship that you aren't jealous anymore ?
I know it's not some magic switch, but I believe it can be improved and managed.
Just don't want it to ruin the relationship.
When I say talking about other women I mean like him talking about previous encounters etc.