How to get your partner to f harder

So I've been seeing this guy for a few months. The sex is already great. However I like to be f'ed hardner than what he usually does. We're both kinky so we're both into it and talk about it but it's half a hair away from being -exactly- what I want.

I've already communicated that. But idk if he can do or gets what I mean.

I think he's scared of hurting me, even though I've expressed how much I want it. How do I convince/assure him to unleash all of it?

...

I'm thinking about finding a porno to send to him so he can visually see what I'm talking about.

I also think if we practice using the safe word more he'll feel more confident and comfortable.