Hello folks,
Well it does indeed, I have been on my own personal smile-sharing experiment for the last 2 years at least and I'll tell it is such a fabulous feeling, that what I get and the other person gets a free smile.
Caveat -- don't flash your pearly whites at a large angry looking man down a dark alley : -)
You all let us know your results, reminds me of the dansing man in the clip below.
http://www.youtube.com/watch?v=zlfKdbWwruY
When you may have nothing to give you can always give some hope !