I am friends with 98% of my ex's

I am friends with 98% of my ex's. Most relationships ended on a good note, and some of those that didn't we ended up forgiving each other later in life and still stay in touch. I am currently married and I can tell that when I talk to certain ex's (the more serious ones) that he gets a little jealous, but I just assure him that they are ex's for a reason. We have not had issues over any of it.