Belle

Belle depicts a full-breasted woman who, feet apart and standing in a doorway at the top of small set of steps, looks self-assuredly into the world.
According to Mariska Majoor, founder of the prostitution information center and herself a former prostitute, the statue is meant to show respect to the millions of people around the world who earn their money in prostitution.

I personally met Majoor because I went to a tour of the district organized by her center, if you do visit Amsterdam then you should participate in this because it's really informative.