The customer has the right to choose the girl with whom he wants to spend some quality time. This is what we call privacy. There is no question of pressure. These girls are ready to please and are always calm when they are dealing with customers.
There is no relationship that can not work between the two. You just have to understand that this is a serious business. There is nothing casual about this. You should treat this as a job and treat them accordingly. They are in this business for much more than just money.