Guys, why would you smile at a girl you see?

Anonymous
I happened to be looking out a window & noticed a colleague, who showed hints interest about 4 months ago, out of the corner of my eye. He smiled, as in a genuine smile, at the sight of me being distracted... well daydreaming as it were.
Interest/Attraction
Means Nothing / You just Amuse him
Other
Select gender and age to cast your vote:
Guys, why would you smile at a girl you see?
2 Opinion