Some people just needed permission to smile again.

The prospect Smiler was a manic farmer. Few men I think can have been as unfortunate as he; for on the one hand he was a melancholic with a loathing for mankind, on the other, some paralysis had twisted his mouth into a permanent and radiant smile. So everyone he met, being warmed by his smile, would shout him a happy greeting. And beaming upon them with his sunny face he would curse them all to hell.

When we first arrived, it was large groups of people in large areas with no stimulation. By the time we left, it had become a town.

He'll just smile and be cordial out there. Then he'll kill you.

They just make people smile.

He walked around with pockets full of quarters, handing out handfuls to people just to put a smile on their faces.