I have an explanation to that. Plenty of authors I bet by now you've realieed have introduced thw concept of rape, SA torture and soa much more. It's not just them creating stories like that then it gets published no. It basically depends on the demands for it. There's more than 70% of people who are into reading all of this but won't accept it. The author and the publishers work based on demand and hence they supply that's the reason for it dispite being disturbing It's yet in the top most read manhwa. People are more likely into reading this and enjoy it as well than yoi might think. But again no one is going to accept that. Why? Cause that will make them the weirdo or freak or anything else but they actually enjoy reading it. Plenty of them ONLY enjoy reading such clue they find it interesting how all of this works and get curious about it and want to explore more. While some even wish to be in the seme's position and some even on the uke's position. And its not shocking honestly. Cause Plenty of these people try to appear normal and be normal but actually have hidden. desires. Hence that's how these stories are being made and easily published Cause of the demand for it
I agree w your statement but I’m still shooketh to my core. Like I literally feel so fkn disgusting, And like you said ppl put themselves in seme/uke’s place I’ve seen this w my 2 own eyes on reddit bout how ppl are literally fantasizing all of this and were saying “Oh, How I wish if I were in place of mc” this and that. And it’s actually disgusting to see how these typa themes are in demand.
Back in my early yaoi days I once read a Chinese bl novel where the seme got mad because he thought the uke was cheating on him/lying to him…and then he stabbed his butthole with a knife/sword. That is still the most traumatic thing I’ve ever read. Though this manhwa especially the version with the dog stuff, is a close second.

This literally the most disgusting and vile shit I’ve ever read in my Yaoi years. To this day I’m wondering how tf did the author even came up w smth this disgusting and then wrote it and published it and then it got adapted too.