My boyfriend talks about our sex life in front of his friends

So just wondering would this upset you when my boyfriend is drunk he will constantly talk about our sex life in front of his friends or he will say to his friends do you remember when I told you this and say something to do with sex so he is clearly telling his friends about our sex life when I am not there. It makes me uncomfortable because he’s the only person I’ve ever been with and I Feel like it should be private not shared between everyone