Do you ever talk about your exes to your current S.O. ?

I can understand to a certain degree while people frown on this. However for me, my exes are a huge part of my life history. To not ever talk about them would be like cutting out many years of my life.
My ex husband and I were together for a total of 12 years. Basically our entire young adulthood. My ex partner of 4 years was also during a very important part of my life.
I am fortunate in that my current husband is fine with me talking about them. I don’t so much talk about them in regards to themselves but more about things we had together.
Like I will talk about the house I lived in with my ex. Or a concert I went to. Both relationships were left on good terms and there was no abuse.
Do you have problems with your S.O. talking about their exes? If so, why?