Exactly. For some, though, sweet submissive, small breasted, slim petitte, thick lipped {as in Angelina Jolie} darker/tanned Asians {mostly} are not their style of drug, and places like Brazil {think doggystyle} or Hong Kong {more white bodies}, or Europe, etc, would be their preference, as far as the flesh is concerned.
Of course their are many other possible considerations, besides the physical, when choosing a pooner destination, such as, for a few examples, {a} general safety for tourists, {b} expenses, e.g. cost of travel, hotels, etc and {c} attitude, service, & prices for the escorts, etc.
Some guys like Cambodia over Thailand cuz they think it is cheaper, the women have a better attitude, and many white Vietnamese are there. Then there are places like Macau, for example, or Canada {where prostitution is basicly legal} and you can find just about any nationality, from African to Russian.