They do not come from Bangkok.
Sure, hookers fuck for money. But that is not what we are talking about, we are talking about hookers that have a normal jobs also.
I believe that most just say that shit to someone so they will agree to a quick short time session."Sorry, I have to work in the morning","Sorry, I have class in the morning" is better than saying "I'm in a hurry, my boyfriend is waiting" or "Sorry, I have not smoked any ice in a few hours".
Most Thai hookers are lazy and like to party. They like the job. They like the lifestyle. It is not sick buffaloes and bills to pay.
If I could choose between fucking and working hard. I would choose fucking.