Contact with previous affairs?

It is very important for my boyfriend to keep in touch with his previous affairs. Some of them dont live where we are living now, he is just texting with them, and to me they are just random girls hi has been hooking with. It seems to me that it is important for him to tell me about these affairs and that hi is texting with them, and he says that he is just friends with them now. At the same time he seems to find it uncomfortable when I talk about my previous boyfriends and affairs, which is also why i dont initiate contact with them any more as we are in a serious relationship, and i dont want to upset him. I also told him that dont talk much with my previous boyfriend and affairs, because i can see that this upsets him. I also told him that if these previous hook ups are important to him, he dont have to tell me everytime he is talking with them, how fun and cool they are, as i find this a bit uncomfortable. he seems to get upset when i show that i dont fint this very cool to hear about, even though i dont put any restricions on this, i mean, he can keep in touch with them, he just dont need to rub it in my face. Thing is, that my boyfriend seems to have a need to tell me about these girls, and how great they are. I told him that I dont need to here all of this, and he seems to get to upset, or even angry, when i imply that this is not very interresting for me to hear about. Im a pretty laid back girl, not jealous and i know im attractive with guys. At times i wonder if he wants me to feel insecure or something. I think the big difference between us is that i dont want to make him upset, which is why i dont text with my exes anymore. My boyfriend dont seem to care about this, and I dont see his need to stay in contact with previous affairs and keep talking about them to me, and i wonder if this is really okey. Can someone help me debunk this?
Contact with previous affairs?
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