
Suffer as to don't ask to do it anymore. Like you have a sibling, you ask them to either do housework or eat chili (if they eat chili, you do the housework). They say they will eat chili. But you give them so much they are going to do all the housework for years just don't give them chili again. Sorry it's a lame explanation... and the opposite one too, but I hope you got it
In the story, he has to suffer having sex instead of letting the other go (o forgor the names srry), so he doesn't ask to do it anymore (whithout feelings I think)

Yeah, it has a bad taste to it :/ but I think "tiring him out so doesn't follow" would mean it won't last long. I mean we all want to solve thinks a way we don't have to solve later (when your pipe is leaking, calling a plummer and not taping). And "tiring out" would be that (taping), and using sex against your beloved to "hurt" them this way means after like a few days you would have to do it again. Be rough and cruel. You would do this (ideally) only once to them, don't you? Or not even once, but the state he is in, it's inevitable...
At least this is what I think.
Any other thoughts? (●'◡'●)ノ
I think maybe the translation is wrong. Maybe he's saying he's gonna tire him out so he can't leave tomorrow while he goes to do his job cause we all wondering what kind of logic is that it was so random and doesn't even make sense
Why would he need to suffer??