I hate the lack of communication

But it's there? The only problem is the hesitation and self-doubt. I think talking about it would only make the MC know that his partner is also self-aware. Which he's already trying to somewhat change that, to fit both thier needs.

Yeah but Goo ja-wook said that it still hurts and he doesn’t feel the same pleasure that yung yeon feels, I think if Goo Ja-wook told him they could find a way for both to feel pleasure

I'm pretty sure that gyeom knows it's too much, but wants to test jawooks limits. He notices how jawook is lying when he says he likes it and makes it even harder for him precisely because he lies about it.

But i feel like if jawook just said he doesn't like it, gyeom wouldn't even be half as interested in him. Those mfs have a Hella twisted relationship