Spoiler (click to show/hide):
I'm trying to think of what else you could do in a sex dungeon besides sex or dungeon things. I don't know, does he have any hobbies like blacksmithing?
Also, let me know if I've managed to forget once again how the magic is supposed to work. IIRC, sex in general is power, but he has to seduce or kill mortals to get dungeon points to improve his dungeon.
"If you don't want to have sex, you can just say so." She pouts before returning her attention to the question. "If you're not interested in sex or building the dungeon, I suppose we could practice your magic a bit or spar?" She thinks for a moment, although it's less like she's trying to remember something and more like thinking on how to articulate it. "Okay, so imagine that monster magic is water and mortal magic is clay. If you want to build a bigger bowl to hold more water, you need more clay. But the clay is only useful for gathering the water, see? It's not the best analogy, but it'll work for now." She seems satisfied with that explanation.