I think this is worth a dig on this. I am looking through the interwebs to trying to find some origin of the Steele dossier. I seem to recall a report that the story line (Russian prostitutes peeing, etc.) was actually from a story concocted much earlier to be used against yet another Republican. Am I mis-remembering this or do other FReeQs recall this? Maybe it was a joke posted all the way back in the 4chan days....
There is another source which seems to give a detailed timeline, but
. :Pissgate - RationalWiki
Way back when the Dossier was posted on BuzzFeed, I read about the guys on 4 Chan had posted the Pee Pee stuff as a joke. Might have been in the /pol/ section.