Does anyone have the link to the thread about what women did for birth control in brothels or what they did?
Are you looking for the recent one (3 weeks ago)? It's here:
Well, there have been several threads on prostitutes and contraception; a quick search for "top" posts for "prostitute preg*" turned up these popular examples - is the one you're thinking of here? If not, can you be more specific, e.g. about how long ago? any particular users? wording of the OP?
NSFW. How did prostitutes in brothels non get pregnant during medieval times? 10 months ago featuring /u/sunagainstgold and /u/kookingpot
In early times, where brothels and prostitutes were a part of everyday life, how did the prostitutes avoid getting pregnant? 3 years ago featuring /u/armer_heinrich