According to the BBC World Service website, "in Thailand, anywhere between 100,000 and 1 million people are involved in the industry."
A BBC World Service discussion on "World Have Your Say - Is sex tourism bad for Bangkok?" is available to hear on BBC iPlayer from now until Wednesday 16 February.
Quote from the programme :
(BBC Interviewer)-- Is there anything about the sex industry in Thailand that makes you uncomfortable?
(British male long-term resident of Thailand)-- No, no, not at all ... It's very open and very, very geared towards the tourist industry. It's only one part of a great lifestyle that you can have here.