that's what my wife said, the question by Simon didn't state any pertinent information so as a general rule to travel in any other country unless you lived on the border province you would need a passport which is easily attainable in Thailand.
I am not sure about the length of stay in Cambodia without a passport even in said province. I see that route 5 and 59 probably the way in and easiest way to get to Steven's street but the poster didn't say if they were trying to get to angkor wat or just a border town run or were they flying in.
all the thai women I know that have come to America said that they wanted to see America and different places in America, they did their homework and all were single.