@daisaish @MW2366i it would literally only be important for saving up for a boss battle to use during the decisive moment. In a sense, I could see it being a viable method for normal people. For everyone, the dungeon is a matter of life and death, they can easily die and that's why most people don't venture into further levels even if they'll be able to. If it means remaining celibate for a month or so to be able to have a powerful attack to finish off a boss monster for a dungeon level, why not? If it keeps you alive and successful, it's worth it. But for someone like MC where he doesn't have the same mentality that a lot of other people native to this world have, and because he has very strong and broken abilities and a weapon, he didn't automatically have the same level of fear. He's slowly gaining that fear now because of some experiences now. It may come a day where he may have to rely upon that skill, and that itself can be a story plot in itself. Where he normally indulges himself with the girls, perhaps it comes a point where there's a boss monster that he's not completely confident in being able to kill without losing someone, and so he may end up trying to stay abstinent for a time to be able to pull off that skill. And maybe he doesn't explain that to the girls because he doesn't want to seem weird by letting them know he's able to see all these different skills and jobs, and thus they feel like maybe he's lost his feelings for them. But then again, with this being an ecchi manga, I don't think going for long without a sex scene would fly for this manga lol.