How not to use teeth while being face and throat fucked?!

Okay so I don’t think I’ve had issues with using teeth when I’m giving a bj. I can notice it and feel it sometimes if it happens to happen and I just adjust myself and continue sucking. Last night my bf wanted to fuck my throat, I let him. He got on top of me and started thrusting. Eventually he tells me “less teeth baby”. I tried sucking my lips under and sticking my tongue out but I think it was hitting the back of my teeth due to the angle he was thrusting. Afterwards I apologized for using teeth and he was okay with it. He said “that’s what they call eating dick”. lol I just want to know if there’s tips to avoid it, he was thrusting fast, hard, and deep which I love but I’d love to control the back teeth problem. First time we do this together in our relationship in that angle so I’m thinking it’s the angle he was fucking my face. Any tips please!