Dirty talk

I want my boyfriend to talk super dirty during sex... I’ve told him I like it when he talks to me but it’s not dirty enough 😅 he did it one time and It was super hot, I told him I liked it, and moan and everythinh but he hasent done it since and I want him to do it... I already told him. It didnt seem like he was uncomfortable with it, he has been more vocal about it, but not as dirty as I would like to....

Dont know why he has not done it again... ideas?

UPDATE: I know he is comfortable with it because we sext alot, almost daily and he talks like that