Dreaming of prostitutes usually denotes the dreamer’s poor self-image. It often brings up guilt or insecurities in the dreamer.
The dream may also mean that the dreamer isn't using his/her full potential in both his/her work and personal life. Finally, dreaming about prostitutes may simply just denote hidden sexual desires.
Dreaming of paying a prostitute may mean that the dreamer has no confidence in his/her natural abilities and talents. On the other hand, to dream of being the prostitute may suggest a fear of relationships.
A woman who dreams of a prostitute probably just needs sexual freedom while a man who dreams of it may mean that he currently needs to be in a relationship.