Man completely silent during sex

There’s this guy (27) I (27F) met a month ago, and we had sex for the first time last night. He didn’t make any sounds during, not even while finishing. I’d have to stop from time to time to ask him if he liked what I was doing. He said it was great. But he didn’t even BREATHE heavily, you know what I mean? And this made me feel unsexy and less confident in what I was doing.

I laid on his chest after and he suddenly said, “I’m not very expressive” as if he were trying to explain himself. I hadn’t mentioned anything about his lack of noise btw. He just brought it up himself. I wasn’t sure how to tell him to be more vocal. I don’t want him to scream like a hyena but at least breathe? 😂 So how can I tell him next time? I don’t want him to feel like I’m forcing him to do something that doesn’t come out naturally.