More can always be said about a topic, but while you're waiting for a more thorough answer, here are a few old threads that may provide you with some context on the matter (remembering that rules regarding answers have changed over the years):

https://www.reddit.com/r/AskHistorians/comments/19yc5w/people_often_say_that_prostitution_is_the_worlds/

https://www.reddit.com/r/AskHistorians/comments/1kbyzc/i_apologize_if_this_has_already_been_asked_the/

And here is a slightly more recent answer from /u/deVerence:

https://reddit.com/r/AskHistorians/comments/68xj4i/how_true_is_the_quote_prostitution_is_the_worlds/dh47tnq