Check out this neg... I've only used it a few times, but its universal and worth some extended field testing:

-whoa, are you giving me a fake smile? right on, thanks!
-really, you have a lovely smile, but is that for real? You look like you are in that commercial, etc.
-Oh wow, I can tell that was a real one...
-did you know that a forced smile and a natural smile are triggered by different parts in the brain?


Its a good neg right after the opener because most girls are trained to smile just to look pretty and polite during introductions. You can go several directions with the conversation by talking about different kinds of fake smiles or making fun of the target to her friends or making fun of the venue. Her natural reaction will be to justify that her smile is real, which will play into your game. The fact about where the brain triggers smiles is true and is mentioned in several books by the popular neurologist Antonio Damasio...

Has anyone tried this?