am I weird?

I don't know why but it always turns me on when I imagine my bf with other girls before he met me. I sometimes ask him questions about his ex (he is fine with that) and it always makes me so horny. maybe because I imagine he was quite popular among girls and now his heart belongs to me and I'm so happy I can have him. I'm really not a jealous person. like if I would see some girl trying to get him it would just turn me on and of course I would show her he's mine but I wouldn't be jealous or upset. just turned on. do you guys think that's weird or wrong?