In Brazil the majority of the guys at the saunas do not cum because they will look for another client as soon as they leave you. To cum, the guys want extra money - generally double the price. That is understandable, after all they are there for the money.
On the S. Korean massage sites, it is written that the guys "do not cum". Reading this prompted me to open this topic. Also, I decided to forego a trip to S. Korea and return to the land of "happy endings" for one and all.
Thanks everyone for your input.