Prostitution is sometimes referred to as "the world's oldest profession".
Wiki Sex Guide tells about the sex and prostitution of different locations.
The term originates from the red lights that were used as signs of brothels.
A red-light district is a part of an urban area where there is a concentration of prostitution and sex-oriented businesses, such as sex shops, strip clubs, adult theaters, brothels etc.
Wiki Sex Guide has listed the red-light districts in each city.
These kind of areas are also called as "tolerance zones".
Wiki Sex Guide advises where to find sex, prostitution, escorts, red-light districts, prostitutes, sex workers, street hookers, escort agencies, erotic massage parlors, brothels, sex clubs, strip clubs, striptease, KTVs, swinger clubs, BDSM clubs, sex shops, adult theaters, love hotels, short-time hotels, nightclubs, bars, gay action, lesbian action, dating, transsexuals, sexual services for women, girl-friendly hotels and how to stay safe and avoid common scams in each location.