Well this is a variation of "what the butler saw" - I think these stories are likely to be an excellent contender for the "bad sex" awards given by another British newspaper, "The Guardian". I would prefer to get the story from the horse's mouth - say from the days of Catherine the Great. Of course that would require quite a lot of imagination, and certainly would be so controversial that even before it is published, it would be famous - of course it is possible that the story was a cruel and distasteful invention of someone or group that bore her grudge...