Lays and the Smile Operation

[vulcanlogician]

Do you think intentionally smiling can lead to real smiles? I used to do this exercise with my therapist where we would look at each other and smile, and if I ever felt that the smile was too big, or too fake, I made it bigger and faker. In the context of the therapeutic exercise, it really did lead to a real smile.... each and every time.

But it got me thinking: Can intentionally smiling in a candid setting lead to real smiles?

Thoughts?