Really? Mushrooms as a stand in is common in a lot of hentai I read and with them obvious being parasitic in nature with them growing on you that a final stage would of been them becoming a penis or replacing yours
I have never seen that.
Well mostly because I have a very specific kink, but I don't recall an Hentai being mentioned where the Penis was overlapped by a Parasitic Mushroom.
It more girls eating mushrooms and becoming futas
