To dream of a prostitute represents an aspect of your personality that sells itself out. It may reflect your self-interest before higher ideals or being more concerned with money than anything else.
Alternatively, dreaming of a prostitute may reflect you or someone else that provides a service whenever they are asked to. You or someone else that is easy to use.
Negatively, a prostitute may represent "caving in" or giving up higher ideals as soon as pressure is felt. Abusing talents, or lowering your standards, morals, or principles for personal benefit. Getting ahead or enjoying yourself without any regard for standards or quality.
Men with pregnant wives commonly dream of having sex with prostitutes. This may reflect their impersonal feelings about using their wife to have sex when she too pregnant to be in the mood.
Example: A man dreamed of a seeing a prostitute walking towards him. In waking life he spoke a second language fluently and someone who needed his help kept offering to pay him to do translations. The prostitute reflect his willingness to do whatever he was asked when paid.