Which one of my Ex's were the prettiest?

Natasha
My boyfriend came and sat down next to me and asked me," I showed you all my exes, I want you to tell me which ones the most beautiful cause I would have stayed with them for a year if I wanted to" I was like," why? what's the importance of this?" then he responded," because I want to know, it's important cause they're a part of my past." I was just like," yea okay, I don't see why it's a big deal..." then he sat there for a solid hour waiting for me to answer. He was like," well so and so thinks this Ex was the prettiest" and I was like," mm okay and I care why?" and he tells me he just wants to know. I asked him if he wanted an ego boost or something? I named a few that were really  pretty and he seemed very enthused or proud, I couldn't tell. He does bring up his exes a lot and gushes over how beautiful they are and how his plentiful amount of realationships only lasted a week or two. Mostly because he got bored with them or he thought they weren't compatible. Mind you, we are going on our 2yr mark in Nov. He tells me, I am cute or pretty every once in awhile. But why would he bring these women up if the relationship didn't last long. Some of the women he dated were very pretty, none less than gorgeous. He likes to compare them like they were throphies or which ones could have or would have been. He gloats alot of his first, me and his ex fiance cause he was our first loves.