maybe off topic, not sure (but certainly useful in the hobby when meeting new prospects)
Survey on telling whether the smile you get is fake or real
http://www.bbc.co.uk/science/humanbody/mind/surveys/smiles/
PS 16 of 20.
Survey on telling whether the smile you get is fake or real
http://www.bbc.co.uk/science/humanbody/mind/surveys/smiles/
PS 16 of 20.