I vote "What's An Edwardian Word For Penis" as a post on the comm. I don't know how much work it would be to have people comment their new discoveries to have an occasionally updated list, but it's something I've done more generally elsewhere. One Hundred Penis Names, the document. I alphabetized it.

(Also as an academic, I'd be in tears of laughter + joy to have a list of ye olde penis names, sourced).