I've been thinking his Jinx started from someone on the agency he signed in probably it was initially offered to him that he can request someone to have s€x to cool off and it becomes a habit that he claims it now as a Jinx or it was his coping method as we saw his backstory [and Heesung got to know about it because he thought Jaekyung might be a match for him but was a complete opposite and he never told anyone about it ]
Then probably at some point when the conflict between Jaekyung and Dan was all good and they got together, Dan will most likely make Jaekyung realize he was just too good to have a Jinx like that.
I've been thinking his Jinx started from someone on the agency he signed in probably it was initially offered to him that he can request someone to have s€x to cool off and it becomes a habit that he claims it now as a Jinx or it was his coping method as we saw his backstory [and Heesung got to know about it because he thought Jaekyung might be a match for him but was a complete opposite and he never told anyone about it ]
Then probably at some point when the conflict between Jaekyung and Dan was all good and they got together, Dan will most likely make Jaekyung realize he was just too good to have a Jinx like that.