Sometimes the most timid maid in the room can contain a bestial zoo inside her head. Just because someone lingers by the punch bowl and looks comfortable in a folding chair, doesn't mean there is a lack of lust in that person's libido. You cannot judge a book by its cover, not even a Bible.
Human beings are many sided things, New Londoners more than most. They are aristorcrats of the gutter, they are Morlocks among the Eloi. Who is who and which is which is a matter of circumstance and situation. The most demure damsel can be a tiger in the boudoir, but you will never know. If New Londoners appear angelic, they can also be devlish. We are all human after all, containing the divine and the demonic, the pure and the purulent, perfection and perversion.
Beware the wallflower. She will eat you alive like a carnivorous plant if given the chance. "Come into my web," said the spider to the fly. Just don't get caught like an ant under a magnifying glass. You will regret it more than being brave enough to chat up the wallflower at the ball rather than the belle. Be careful what to expect.