My bf refuses to pull out

He even brags to my brother that he's trying to get me pregnant. I'm embarrassed to admit I like it and I like everyone knowing he cums inside me. I got so horny when I first heard him tell my brother. I felt dirty. But hot. I want to have multiple kids by him. It's so sexy when he cums in me and he moans from it. The pleasure he feels turns me on and I want to be pregnant so bad. But everyone keeps telling me I shouldn't let him get me pregnant.

Also why hasn't it happened yet? Is it normal to take so many times?