The value of a smile

A Tumblr blogger (blog here) from the Netherlands wants to get a smile from every country in the world. He writes

A smile costs nothing, but it means much.
It enriches those who receives it and doesn't make poor the person who gives it.
Though a smile may be given only once, the memory of it may last forever.
The rich cannot survive without a smile, the poor cannot get rich because its comfort.
A smile creates happiness to everyone and everywhere. It’s a sensitive sign of friendship, goodwill and...