You ignored the first half of what I wrote.
Read the quotes below.
In 2008, Karina Schaapman, a former prostitute and former member of the Amsterdam city council, produced a report about the Amsterdam sex trade. She offered the police a Facebook with 80 "violent pimps", of whom only three were Dutch-born. She said that more than 75% of Amsterdam's 8,000 to 11,000 prostitutes were from Eastern Europe, Africa and Asia
In 2005 Amma Asante and Karina Schaapman, two councilors for the Labour Party (Netherlands), wrote a report, "Het onzichtbare zichtbaar gemaakt" (Making the Invisible Visible). Schaapman had once been a prostitute and was getting information about the influx of organized crime and violence into the business. Other reports came out around the same time. They concluded that a large number of prostitutes in Amsterdam were being forced to work and were being abused by pimps and criminal gangs, and that the goals of legalization were failing.
Eye contact is a strong form of choosing Bliss. You're right that it's good. You're wrong that eye contact is always good.
Nothing is always good to do.
Don't take the quote word for word. Take the quote in it's spirit. Two pimps can do things in drastically different ways.
Overall, the observations that you will get from seeing it first hand will be more beneficial than talking about it. If you see a pimp talking to them, which is unlikely since pimping is pretty much illegal everywhere, you'll see behind the scenes.
If you see and hear how they handle a trick you'll be able to reverse engineer what I'm getting at.
It might be helpful if you have enough time to pick the prostitute with the most amount of customers and see where she goes if she goes anywhere and how long it takes her to finish from a productive vantage point. This way you have a better shot of hearing her in action.