From what I can tell, the lines are more blurred between prostitution and regular sex. Or, prostitution is so completely normal over there, it comes across as a cultural norm.

Also, apparently the S.E.Asian girls really rate Western guys, and the Western guys really rate the S.E.Asian girls.
... for more info on this look at YouTubers: Angel-tour net, Bangkok 112, Dead Farang.

I haven't been over there, just researching.