Yeah I saw that same art that's interesting it could be but then again she say said most people would find the fetish "weird and disgusting" while the asthma thing is weird it's not so much disgusting
Coming from the girl who talked about wanting guys to fuck her plushies and cum on them It has to be something so specific and embarrassing to make her never want to say what it is
Considering her smelling fetish, maybe cum snorting or cumming right up the nose. Those are pretty rare and would fit her definition of "weird and disgusting".
Considering she's talking bout tags, it doesn't have to be something she can experience IRL. It could be something beyond guro, as a mild example, but more extremely specific.
idk if cumming on the plushies is that weird, it is tribute adjacent and those are definitely not rare, and i feel like the touhou community have done far worse to their fumos than just soaking them in cum.
What if it's something like plague spreading or being a vector slut. She is realliy into the thought of getting sick and spreading it to other people. A slutty patient 0. Thats pretty disgusting