Well, none of the three (four?) times I went to Thailand did I explicitly go for the sex tourism (unless honeymooning [not with a Thai] there counts), but still, I saw a lot of it, and even had my bits groped backstage at a drag show (all in good humor), and I can't imagine there are many tastes they don't at least attempt to cater to. At least ten-fifteen years ago. I haven't been in some time, now.