Am I missing something? Why do some of the providers bill themselves as a "Barbie"? Certainly can't be a reference to the doll.

Slim waste and big breast but I've rarely seen a girl who advertises as a "Barbie" that actually looks like one. The few I've noticed that do match the description tend to look too plastic for my taste.

You mean like this? http://columbus.backpage.com/FemaleEscorts/brooke-the-barbie-440-444-4433-24/17659479