When I was 18 I hiked to Turtle pond in the Maine woods and sat by the waters edge on a rock and dangled my feet in the cool cool water.
These little tiny inch and a half long fish started kissing my toes. There are no bites, Its just like they they try to get your attention or that they are trying to figure out just what these things are in the water with the slightest of nudges.
It was both amusing and cute. In nature it seems more fun than having it done as a business but c'est la vie.