Avert your vanilla eyes this is shameful
Headcanon that heaven demon sperm/semen is addictive as hellll like getting creampied is the height of pleasure it's genuinely narcotic sooooo
Ming fan who experiences a qi deviation or a aphrodisiac pollen or a papapa device of some kind that led to him having a one night stand with TLJ, problem is due to heavenly demons being so rare and obscure ming fan has no idea of any of the properties in TLJ's blood and bodily fluids, hell maybe even tlj himself doesn't know since he was sealed for so long that guy gotta have some kind of brain damage. When TLJ finished inside ming fan was none the wiser.
He keeps going back again and again and again. Having no idea why he couldn't stop or why he was so addicted to the point where he would bring his work over to TLJ's place just to finish them as quickly as possible before getting tangled in the bed with him again.
Mf is absolutely aware that something is Wrong but he couldn't tell what. All he knows is that without tlj he feels tired, irritable, lethargic even nauseas at times. His moods become worse and he snaps at people and gets into meaningless fights and arguments.
He tried to solve it on his own by going days or a weeks at a time without seeing the heavenly demon, buying yellow books, masturbating violently until his fingers cramp and he's just fingering himself to fill the void when it doesn't even give it pleasure anymore. But unfortunately none of them really work and he comes crawling back to tlj.
Now this could go two ways.
A. Tlj doesn't know, and tries to figure it out they eventually figure out the problem which leads to the invention of drug rehabilitation centers and condoms.
B. Tlj *does* know and is doing this on purpose to try to get mf addicted enough that he could eventually steal the disciple away without anyone knowing.
I've said my piece I must leave in shame now











