Sex Tourism in Thailand (Bangkok)

As expats living in Thailand we are often confronted with hordes of tourists from countries like Germany, Italy, Spain, UK, US etc. coming here for pleasure. Wherever you go, Bangkok, Phuket etc. you see old guys, big guys with young and pretty Thai girls. What do you think about it? Do you feel ashamed of your countrymen, do you feel pity for the girls, or do you think it is just a business that is good for both sides?