I often feel not enough for my boyfriend and he has had a lot of girlfriends I feel like I'm just another one. So I asked him to pretend there was no one else before me and to stop talking about them to others. For example, his best friend asked him about what him and his ex did in bed and it made me feel uncomfortable because he answered. 

I asked him to pretend that his past with them never happened and he agreed but I don't know if he only agreed that with me or when someone else asks about his previous relationships. 

Is it a toxic request?