There are areas in many big cities around the world which have acquired an international reputation as red-light districts.

The term originates from the red lights that were used as signs of brothels.

These kind of areas are also called as "tolerance zones".

Some cities have also law that forbids prostitution on any other areas of the city than red-light areas.

Prostitution is the business or practice of providing sexual services to another person in return for payment.

The legal status of prostitution varies from country to country, from being permissible but unregulated, to a punishable crime or to a regulated profession.

Call girls often advertise their services in small ads in magazines and via the Internet, although an intermediary advertiser, such as an escort agency, may be involved in promoting escorts, while, less often, some may be handled by a pimp.

The client must make an appointment, usually by calling a telephone number.

Wiki Sex Guide tells about the sex and prostitution of different locations.

Everyone can edit the articles and we will do the moderation if needed.

Usually the official RLDs have legal prostitution and unofficial RLDs have illegal prostitution.