Looking for a fic

[classicdrogn]

ISTR one where the McGuffin is that the Ultimate Weakness Moxibustion point temporarily kicked back in and let Hiroshi and Daisuke overpower Ranma-chan, because they thought she was still just play-acting after talking lots of shit earlier and would seriously kick their asses if she was actually not into it. (Boasting about the size of their packages, and Ranma challenged them to prove it? Something like that.) There was something about Genma having used libido-suppressing points on Ranma that didn't apply to the girl form I think? It ended with Ranma using Drowned Twins water to separate into permanent girl and boy halves, because the girl side was hooked on the D while the boy side still couldn't connect to the idea of sexuality at all, as the lust suppression point was designed at Happousai strength, or something along those lines. This was different enough from the initial description I didn't think it would apply, but as things seem to be moving more in that direction...

Anyway, I think it might have been a T. H. Tiger fic, but possibly under a different atnick? I don't remember what the other nom de plumes he went by were, just that there was at least one more.