COMMENT PLEASE

As some of you know my bf left me...... but here is was started it. There was a guy that I used to talk to before I met my bf....... my bf new him from when he was in high school. I did have intercourse with that guy, but this was a year before i met my bf! We have argued about it over and over again. He is obsessed w/ this!!!!!! He wants to know exactly how the  sex was... EVERY DETAIL! How big the other guy was compared to him, if i was loud while we were having sex, how long it lasted, if it was good or not...etc. Its crazy. I mean its not like I even knew my bf yet, it was a whole year before that! He is acting as if I cheated on him! And let me remind you..... we have argued about this before...... it is now been 3 yrs and he has decided to get extremely mad about this situation and says im a whore, slut, hoe... and so on. He says im lying about it thats why he is so mad. WHich im not. But i just hate talking to him about it because he gets sooooo mad and yells and calls me names. But should it really matter?? I didnt know him so does he really have a right to get mad? It was my past and I cant change it. I don think it should matter because its in the past. I dont ask him about any of the girls he had sex with before me, I really dont want to know. what do you think???