Assuming you mean a serial user of Thai prostitutes, I can't speak for anyone else, as I didn't know any other guys that visited Thailand for that purpose, but I just couldn't be bothered with the BS a guy has to go through to get a western girl friend to have sex. I preferred knowing that I was going to get a happy ending, rather than buying a girl flowers, dinner and a movie and not knowing.
Also, no compromising. When I took a bar girl away for a week or more, I chose where to go, how to go, where to stay, what I was going to do while there ( she wasn't compelled to go on a 4 hour walk in the sun with me, but she had to be there when I got back ).
My holiday, my way.