I think the posts by some of the ladies here pretty much sums it up for America. You wanna play, you gotta pay, and the attitude is mostly business and it shows through in the end product they are selling. I've had plumbers that were more grateful than some ladies. The ladies in other countries, albeit the poorer ones, are so grateful you came a long to help them survive another day or week, and they show their gratitude. Then there are the countries where no money is required to get to play, like Russia, where they only have the choice of marrying a poor, drunk, communist bastard or leaving the country with a successful American. Very fun place to visit. It's also much easier to have casual sex in countries where the stigma is not lambasted by a preacher on every corner.
Having a SB in the states is very similar. A little college hottie that gets her bills paid and spoiled is very grateful indeed.