[Felix considers how to word this for a moment, because he wants her to understand that he's not just humoring her. He honestly just doesn't consider this sort of thing as too important. He'd enjoy it with her, and treasure her for sharing with him, but there isn't this burning need to fulfill like what other men might describe.]

I am comfortable. [That's a start, he thinks.] Honestly, what you're talking about, it's never really been something I need. I enjoy it, and I know if and when you're ready I'll be so pleased to be intimate that way with you, but it's not something I'm driving towards.

I'm not with you because I want that. I'm with you because I think you have a beautiful soul and are thoughtful about the world around you. That and you don't mind me talking about numbers around you, and you willingly learned math games. I couldn't even get Dorian to do that without some kind of remark. [That last part is a joke, and he offers her a small smile to show it.]