Exactly my thoughts!!!
Knowing a little about his personality from the last few chs, o think it's not so wrong to think that maybe Jaekyung believes in superstitions strongly, feeling that winning can lead to bad luck. This fear may come from his traumatic past, where his father's death followed a victory. As a result, he believes he needs to protect his wins with rituals, even resorting to have sex with anyone before competitions.
Rituals that, although seemingly irrational, are part of their quest to control a possible tragedy. It's like a desperate way to calm their anxiety related to this superstition and prevent their fear of bad luck from affecting their performance.
Damn! That’s interesting
Nice theory
Oh!! I like this! It makes a lot of sense! This is my fave theory so far~
I wonder how he got his jinx!!