
One of my theories for this is that he might have been raped or sa'd while in the gym after losing a game. He got ptsd from it and started doing it to other people to empower himself and feel less weak and ashamed. After all, he always needed sex before games to boost him up and empower himself, degrading the others.

Jumin might have SA'd him or his father did.
Jumin might have done it repeatedly whenever Jaekyung lost to him which might have gotten the 'jinx' name. Or maybe he was groomed by his father one night after he came back from gambling

Hold up that actually makes sense!! He could have ptsd of being raped and it caused him to feel weak and ashamed and with men being raped it's very different from women. the way he wants to get back and avenge himself by having sex before a match to feel empowered enough to win and remind himself that he's not weak like he used to be and that is his own way of dealing with his trauma which isn't acceptable ofc but it makes you understand his mindset and why he's the why he is now (aggressive, extremely protective of himself, doesn't wanna show weakness, hates affection)

I don't think people know how messed up this whole chapter is. Jaekyung - that's suppose to be his guardian and not let him drink anything is now following with everything Kim Dan said he wants in his drunken state. Then tries to make it seen like it was Dan's fault for saying that... My god, and on top of that, Dan has to pay him back on everything after Jaekyung takes "care" of him????

Jinx is NOT some kind of deep psychological story. The author just doesn’t know what to do with her characters so she keeps rinsing and repeating the same thing over and over again with Jaekyung constantly raping Kim Dan and the readers keep eating it up whether that be the antis of this book hating the shit out of it (rightfully so) or the fans who enjoy the book keeping this story afloat.
The author wasn’t thinking that deeply when writing this story, trust me. That much is obvious

It doesn't feel like this is getting any better. Right now, they're gonna make them sleep together and Dan will be acting all confused. JUST LIKE THE BJ ALEX PLOT. Honestly, the only problem I have with this yaoi is that it uses it's old book as a reference to what they are making now. Along with the fact that Dan's problems aren't actually getting a depth into it and they will probably remove the problems once Kim Dan and Jaekyung find love with is a Big NO NO.
If you are going to write a plot where the mc has mental health problems, let that consist over the main story and don't use it as a damn "side" story to be trashed.
don't tell me that as soon as he got into Mixed martial arts and saw the positions they were doing, he started hitting it.
thatd be fucking crazy as his gay awakening
Simple.
lmaoo
Now that you mention it, it makes sense. Maybe the Jinx is his homosexuality he has to have sex before the matches to have a clear head for the fight, and not get horny with all that physical contact