How you can tell if someone is faking a smile.

[MattB]

There are 4 differences between a fake(controlled) and a real smile (unconscious)

Real Smile

1.Wrinkles arond eyes
2.Symmetrical
3.Smile at the right time
4.Shorter and fades away in a more natural way

Fake smile

1.No wrinkles
2.Asymetrical (If she is right handed, the left side of the face will be tenser)
3.Smiling at an incorrect time (like 2 seconds after you tell a joke)
4.It lasts longer, and will fade away suddenly.

 

[IntermediateDonJuaner]

True. I have read this from somewhere as well. Nice tip!

 

[drZaius09]

Telling Lies by Paul Ekman.
Go buy it.

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"I love you, drZaius!!!"
---Troy McClure